74506736731 has 4 divisors (see below), whose sum is σ = 85150556272. Its totient is φ = 63862917192.

The previous prime is 74506736713. The next prime is 74506736747. The reversal of 74506736731 is 13763760547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13763760547 = 5501 ⋅2502047.

It is a cyclic number.

It is not a de Polignac number, because 74506736731 - 2¹⁵ = 74506703963 is a prime.

It is a super-2 number, since 2×74506736731² (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 (74506736761) 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, 5321909760 + ... + 5321909773.

It is an arithmetic number, because the mean of its divisors is an integer number (21287639068).

Almost surely, 2^74506736731 is an apocalyptic number.

74506736731 is a deficient number, since it is larger than the sum of its proper divisors (10643819541).

74506736731 is a wasteful number, since it uses less digits than its factorization.

74506736731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643819540.

The product of its (nonzero) digits is 2222640, while the sum is 49.

The spelling of 74506736731 in words is "seventy-four billion, five hundred six million, seven hundred thirty-six thousand, seven hundred thirty-one".