64456556 has 24 divisors (see below), whose sum is σ = 115773840. Its totient is φ = 31388672.

The previous prime is 64456543. The next prime is 64456583. The reversal of 64456556 is 65565446.

It is a super-2 number, since 2×64456556² = 8309295222762272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25460 + ... + 27876.

It is an arithmetic number, because the mean of its divisors is an integer number (4823910).

Almost surely, 2^64456556 is an apocalyptic number.

It is an amenable number.

64456556 is a deficient number, since it is larger than the sum of its proper divisors (51317284).

64456556 is a wasteful number, since it uses less digits than its factorization.

64456556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2591 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 64456556 is about 8028.4840412123. The cubic root of 64456556 is about 400.9489054992.

The spelling of 64456556 in words is "sixty-four million, four hundred fifty-six thousand, five hundred fifty-six".