14978937664 has 28 divisors (see below), whose sum is σ = 29889907200. Its totient is φ = 7447622528.

The previous prime is 14978937629. The next prime is 14978937683. The reversal of 14978937664 is 46673987941.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a junction number, because it is equal to n+sod(n) for n = 14978937596 and 14978937605.

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, 642304 + ... + 665215.

Almost surely, 2^14978937664 is an apocalyptic number.

It is an amenable number.

14978937664 is a deficient number, since it is larger than the sum of its proper divisors (14910969536).

14978937664 is a wasteful number, since it uses less digits than its factorization.

14978937664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307710 (or 1307700 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 64.

It can be divided in two parts, 14978937 and 664, that added together give a triangular number (14979601 = T₅₄₇₃).

The spelling of 14978937664 in words is "fourteen billion, nine hundred seventy-eight million, nine hundred thirty-seven thousand, six hundred sixty-four".