74172397825 has 12 divisors (see below), whose sum is σ = 97383995820. Its totient is φ = 55847452160.

The previous prime is 74172397787. The next prime is 74172397843. The reversal of 74172397825 is 52879327147.

It can be written as a sum of positive squares in 6 ways, for example, as 4108425409 + 70063972416 = 64097^2 + 264696^2 .

It is not a de Polignac number, because 74172397825 - 2¹¹ = 74172395777 is a prime.

It is a super-2 number, since 2×74172397825² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87261220 + ... + 87262069.

It is an arithmetic number, because the mean of its divisors is an integer number (8115332985).

Almost surely, 2^74172397825 is an apocalyptic number.

It is an amenable number.

74172397825 is a deficient number, since it is larger than the sum of its proper divisors (23211597995).

74172397825 is a wasteful number, since it uses less digits than its factorization.

74172397825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174523316 (or 174523311 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 55.

The spelling of 74172397825 in words is "seventy-four billion, one hundred seventy-two million, three hundred ninety-seven thousand, eight hundred twenty-five".