74736872685957 has 4 divisors (see below), whose sum is σ = 99649163581280. Its totient is φ = 49824581790636.

The previous prime is 74736872685953. The next prime is 74736872686001. The reversal of 74736872685957 is 75958627863747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74736872685957 - 2² = 74736872685953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74736872685957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74736872685953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12456145447657 + ... + 12456145447662.

It is an arithmetic number, because the mean of its divisors is an integer number (24912290895320).

Almost surely, 2^{74736872685957} is an apocalyptic number.

It is an amenable number.

74736872685957 is a deficient number, since it is larger than the sum of its proper divisors (24912290895323).

74736872685957 is a wasteful number, since it uses less digits than its factorization.

74736872685957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24912290895322.

The product of its digits is 29872281600, while the sum is 84.

The spelling of 74736872685957 in words is "seventy-four trillion, seven hundred thirty-six billion, eight hundred seventy-two million, six hundred eighty-five thousand, nine hundred fifty-seven".