74473740731 has 32 divisors (see below), whose sum is σ = 81972807168. Its totient is φ = 67248921600.

The previous prime is 74473740713. The next prime is 74473740763. The reversal of 74473740731 is 13704737447.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74473740731 is a prime.

It is a super-2 number, since 2×74473740731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74473740791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43222436 + ... + 43224158.

It is an arithmetic number, because the mean of its divisors is an integer number (2561650224).

Almost surely, 2^74473740731 is an apocalyptic number.

74473740731 is a deficient number, since it is larger than the sum of its proper divisors (7499066437).

74473740731 is a wasteful number, since it uses less digits than its factorization.

74473740731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211.

The product of its (nonzero) digits is 1382976, while the sum is 47.

The spelling of 74473740731 in words is "seventy-four billion, four hundred seventy-three million, seven hundred forty thousand, seven hundred thirty-one".