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64719000018 = 2322331103173283
BaseRepresentation
bin111100010001100011…
…011001000111010010
320012001101012211210200
4330101203121013102
52030021031000033
645422000440030
74450540265151
oct742143310722
9205041184720
1064719000018
11254a1208682
1210662319016
1361453111aa
1431bd4c9598
151a3bba0013
hexf118d91d2

64719000018 has 192 divisors, whose sum is σ = 153931235328. Its totient is φ = 19591735680.

The previous prime is 64718999959. The next prime is 64719000023. The reversal of 64719000018 is 81000091746.

64719000018 is a `hidden beast` number, since 647 + 1 + 9 + 0 + 0 + 0 + 0 + 1 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 228688905 + ... + 228689187.

It is an arithmetic number, because the mean of its divisors is an integer number (801725184).

Almost surely, 264719000018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64719000018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76965617664).

64719000018 is an abundant number, since it is smaller than the sum of its proper divisors (89212235310).

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

64719000018 is a wasteful number, since it uses less digits than its factorization.

64719000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 64719000018 in words is "sixty-four billion, seven hundred nineteen million, eighteen", and thus it is an aban number.