61918297475892 has 96 divisors (see below), whose sum is σ = 170815183695744. Its totient is φ = 17209486195200.

The previous prime is 61918297475887. The next prime is 61918297475921. The reversal of 61918297475892 is 29857479281916.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114644359 + ... + 115183182.

It is an arithmetic number, because the mean of its divisors is an integer number (1779324830164).

Almost surely, 2^{61918297475892} is an apocalyptic number.

It is an amenable number.

61918297475892 is an abundant number, since it is smaller than the sum of its proper divisors (108896886219852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61918297475892 is a wasteful number, since it uses less digits than its factorization.

61918297475892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229827729 (or 229827727 counting only the distinct ones).

The product of its digits is 1097349120, while the sum is 78.

The spelling of 61918297475892 in words is "sixty-one trillion, nine hundred eighteen billion, two hundred ninety-seven million, four hundred seventy-five thousand, eight hundred ninety-two".