64557616 has 20 divisors (see below), whose sum is σ = 128132424. Its totient is φ = 31491200.

The previous prime is 64557601. The next prime is 64557641. The reversal of 64557616 is 61675546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48550 + ... + 49861.

Almost surely, 2^64557616 is an apocalyptic number.

It is an amenable number.

64557616 is a deficient number, since it is larger than the sum of its proper divisors (63574808).

64557616 is a wasteful number, since it uses less digits than its factorization.

64557616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98460 (or 98454 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 64557616 is about 8034.7754168987. The cubic root of 64557616 is about 401.1583423694.

The spelling of 64557616 in words is "sixty-four million, five hundred fifty-seven thousand, six hundred sixteen".