45138718977 has 32 divisors (see below), whose sum is σ = 68547326976. Its totient is φ = 26153476800.

The previous prime is 45138718973. The next prime is 45138718981. The reversal of 45138718977 is 77981783154.

It is an interprime number because it is at equal distance from previous prime (45138718973) and next prime (45138718981).

It is not a de Polignac number, because 45138718977 - 2² = 45138718973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45138718977.

It is not an unprimeable number, because it can be changed into a prime (45138718973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1511563 + ... + 1541135.

It is an arithmetic number, because the mean of its divisors is an integer number (2142103968).

Almost surely, 2^45138718977 is an apocalyptic number.

It is an amenable number.

45138718977 is a deficient number, since it is larger than the sum of its proper divisors (23408607999).

45138718977 is a wasteful number, since it uses less digits than its factorization.

45138718977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31621.

The product of its digits is 11854080, while the sum is 60.

The spelling of 45138718977 in words is "forty-five billion, one hundred thirty-eight million, seven hundred eighteen thousand, nine hundred seventy-seven".