64897056 has 72 divisors (see below), whose sum is σ = 210921984. Its totient is φ = 18541440.

The previous prime is 64897051. The next prime is 64897067. The reversal of 64897056 is 65079846.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (64897051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14080 + ... + 18111.

It is an arithmetic number, because the mean of its divisors is an integer number (2929472).

Almost surely, 2^64897056 is an apocalyptic number.

It is an amenable number.

64897056 is an abundant number, since it is smaller than the sum of its proper divisors (146024928).

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

64897056 is a wasteful number, since it uses less digits than its factorization.

64897056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32214 (or 32203 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 64897056 is about 8055.8709026399. The cubic root of 64897056 is about 401.8602023742.

The spelling of 64897056 in words is "sixty-four million, eight hundred ninety-seven thousand, fifty-six".