64909056 has 72 divisors (see below), whose sum is σ = 173985280. Its totient is φ = 21482496.

The previous prime is 64909051. The next prime is 64909067. The reversal of 64909056 is 65090946.

It is a super-2 number, since 2×64909056² = 8426371101622272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64909051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171075 + ... + 171453.

Almost surely, 2^64909056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64909056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86992640).

64909056 is an abundant number, since it is smaller than the sum of its proper divisors (109076224).

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

64909056 is a wasteful number, since it uses less digits than its factorization.

64909056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 64909056 is about 8056.6156666432. The cubic root of 64909056 is about 401.8849699344.

The spelling of 64909056 in words is "sixty-four million, nine hundred nine thousand, fifty-six".