64520554 has 48 divisors (see below), whose sum is σ = 117554976. Its totient is φ = 26460000.

The previous prime is 64520551. The next prime is 64520567. The reversal of 64520554 is 45502546.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64520551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256929 + ... + 257179.

It is an arithmetic number, because the mean of its divisors is an integer number (2449062).

Almost surely, 2^64520554 is an apocalyptic number.

64520554 is a deficient number, since it is larger than the sum of its proper divisors (53034422).

64520554 is a wasteful number, since it uses less digits than its factorization.

64520554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 64520554 is about 8032.4687363226. The cubic root of 64520554 is about 401.0815604318.

The spelling of 64520554 in words is "sixty-four million, five hundred twenty thousand, five hundred fifty-four".