18628778045624 has 32 divisors (see below), whose sum is σ = 37028216005200. Its totient is φ = 8755908963840.

The previous prime is 18628778045593. The next prime is 18628778045653. The reversal of 18628778045624 is 42654087782681.

It is a Harshad number since it is a multiple of its sum of digits (68).

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, 82502642 + ... + 82728129.

Almost surely, 2^{18628778045624} is an apocalyptic number.

It is an amenable number.

18628778045624 is a deficient number, since it is larger than the sum of its proper divisors (18399437959576).

18628778045624 is a wasteful number, since it uses less digits than its factorization.

18628778045624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165231623 (or 165231619 counting only the distinct ones).

The product of its (nonzero) digits is 289013760, while the sum is 68.

The spelling of 18628778045624 in words is "eighteen trillion, six hundred twenty-eight billion, seven hundred seventy-eight million, forty-five thousand, six hundred twenty-four".