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64791424320 = 2635723994019
BaseRepresentation
bin111100010101110111…
…101010110101000000
320012020102111101021020
4330111313222311000
52030143101034240
645433105025440
74452410006550
oct742567526500
9205212441236
1064791424320
1125529085077
1210682625280
13615731b2cc
1431c8d7d160
151a432090d0
hexf15dead40

64791424320 has 224 divisors, whose sum is σ = 235256832000. Its totient is φ = 14799611904.

The previous prime is 64791424319. The next prime is 64791424331. The reversal of 64791424320 is 2342419746.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-3 number, since 3×647914243203 (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16119271 + ... + 16123289.

Almost surely, 264791424320 is an apocalyptic number.

64791424320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64791424320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117628416000).

64791424320 is an abundant number, since it is smaller than the sum of its proper divisors (170465407680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64791424320 is a wasteful number, since it uses less digits than its factorization.

64791424320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 6435 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 64791424320 in words is "sixty-four billion, seven hundred ninety-one million, four hundred twenty-four thousand, three hundred twenty".