64546320 has 80 divisors (see below), whose sum is σ = 201719232. Its totient is φ = 17072640.

The previous prime is 64546319. The next prime is 64546337. The reversal of 64546320 is 2364546.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30414 + ... + 32466.

Almost surely, 2^64546320 is an apocalyptic number.

64546320 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 64546320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100859616).

64546320 is an abundant number, since it is smaller than the sum of its proper divisors (137172912).

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

64546320 is a wasteful number, since it uses less digits than its factorization.

64546320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 64546320 is about 8034.0724417944. The cubic root of 64546320 is about 401.1349433798.

The spelling of 64546320 in words is "sixty-four million, five hundred forty-six thousand, three hundred twenty".