64697456 has 40 divisors (see below), whose sum is σ = 129110784. Its totient is φ = 31389120.

The previous prime is 64697447. The next prime is 64697473. The reversal of 64697456 is 65479646.

It is a self number, because there is not a number n which added to its sum of digits gives 64697456.

It is a congruent number.

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, 186275 + ... + 186621.

Almost surely, 2^64697456 is an apocalyptic number.

It is an amenable number.

64697456 is a deficient number, since it is larger than the sum of its proper divisors (64413328).

64697456 is a wasteful number, since it uses less digits than its factorization.

64697456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 663 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 64697456 is about 8043.4728817843. The cubic root of 64697456 is about 401.4477867946.

The spelling of 64697456 in words is "sixty-four million, six hundred ninety-seven thousand, four hundred fifty-six".