74492387391 has 8 divisors (see below), whose sum is σ = 99646712704. Its totient is φ = 49499826840.

The previous prime is 74492387323. The next prime is 74492387407. The reversal of 74492387391 is 19378329447.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74492387391 - 2²⁶ = 74425278527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74492387311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40440115 + ... + 40441956.

It is an arithmetic number, because the mean of its divisors is an integer number (12455839088).

Almost surely, 2^74492387391 is an apocalyptic number.

74492387391 is a deficient number, since it is larger than the sum of its proper divisors (25154325313).

74492387391 is a wasteful number, since it uses less digits than its factorization.

74492387391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80882381.

The product of its digits is 9144576, while the sum is 57.

The spelling of 74492387391 in words is "seventy-four billion, four hundred ninety-two million, three hundred eighty-seven thousand, three hundred ninety-one".