63440618456 has 16 divisors (see below), whose sum is σ = 118953843000. Its totient is φ = 31719593664.

The previous prime is 63440618447. The next prime is 63440618473. The reversal of 63440618456 is 65481604436.

63440618456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63440618456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599471 + ... + 697313.

Almost surely, 2^63440618456 is an apocalyptic number.

It is an amenable number.

63440618456 is a deficient number, since it is larger than the sum of its proper divisors (55513224544).

63440618456 is a wasteful number, since it uses less digits than its factorization.

63440618456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178898 (or 178894 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 63440618456 in words is "sixty-three billion, four hundred forty million, six hundred eighteen thousand, four hundred fifty-six".