18775064979 has 128 divisors (see below), whose sum is σ = 33861058560. Its totient is φ = 10141401600.

The previous prime is 18775064969. The next prime is 18775064989. The reversal of 18775064979 is 97946057781.

18775064979 is a `hidden beast` number, since 1 + 87 + 7 + 506 + 49 + 7 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (18775064969) and next prime (18775064989).

It is not a de Polignac number, because 18775064979 - 2⁴ = 18775064963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18775064969) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12424834 + ... + 12426344.

It is an arithmetic number, because the mean of its divisors is an integer number (264539520).

Almost surely, 2^18775064979 is an apocalyptic number.

18775064979 is a deficient number, since it is larger than the sum of its proper divisors (15085993581).

18775064979 is a wasteful number, since it uses less digits than its factorization.

18775064979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The spelling of 18775064979 in words is "eighteen billion, seven hundred seventy-five million, sixty-four thousand, nine hundred seventy-nine".