74725533987 has 24 divisors (see below), whose sum is σ = 107919345600. Its totient is φ = 45971479008.

The previous prime is 74725533973. The next prime is 74725534021. The reversal of 74725533987 is 78933552747.

It is not a de Polignac number, because 74725533987 - 2¹¹ = 74725531939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74725533987.

It is not an unprimeable number, because it can be changed into a prime (74725533917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875964 + ... + 1915382.

It is an arithmetic number, because the mean of its divisors is an integer number (4496639400).

Almost surely, 2^74725533987 is an apocalyptic number.

74725533987 is a deficient number, since it is larger than the sum of its proper divisors (33193811613).

74725533987 is a wasteful number, since it uses less digits than its factorization.

74725533987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43187 (or 43174 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 60.

The spelling of 74725533987 in words is "seventy-four billion, seven hundred twenty-five million, five hundred thirty-three thousand, nine hundred eighty-seven".