64456945 has 32 divisors (see below), whose sum is σ = 94445568. Its totient is φ = 41223168.

The previous prime is 64456939. The next prime is 64456963. The reversal of 64456945 is 54965446.

It is not a de Polignac number, because 64456945 - 2⁹ = 64456433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75139 + ... + 75991.

It is an arithmetic number, because the mean of its divisors is an integer number (2951424).

Almost surely, 2^64456945 is an apocalyptic number.

It is an amenable number.

64456945 is a deficient number, since it is larger than the sum of its proper divisors (29988623).

64456945 is a wasteful number, since it uses less digits than its factorization.

64456945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009.

The product of its digits is 518400, while the sum is 43.

The square root of 64456945 is about 8028.5082674181. The cubic root of 64456945 is about 400.9497120828.

The spelling of 64456945 in words is "sixty-four million, four hundred fifty-six thousand, nine hundred forty-five".