74725531957 has 2 divisors, whose sum is σ = 74725531958. Its totient is φ = 74725531956.

The previous prime is 74725531939. The next prime is 74725531963. The reversal of 74725531957 is 75913552747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66255274801 + 8470257156 = 257401^2 + 92034^2 .

It is a cyclic number.

It is not a de Polignac number, because 74725531957 - 2²³ = 74717143349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74725531898 and 74725531907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74725531987) 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 as a sum of consecutive naturals, namely, 37362765978 + 37362765979.

It is an arithmetic number, because the mean of its divisors is an integer number (37362765979).

Almost surely, 2^74725531957 is an apocalyptic number.

It is an amenable number.

74725531957 is a deficient number, since it is larger than the sum of its proper divisors (1).

74725531957 is an equidigital number, since it uses as much as digits as its factorization.

74725531957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9261000, while the sum is 55.

The spelling of 74725531957 in words is "seventy-four billion, seven hundred twenty-five million, five hundred thirty-one thousand, nine hundred fifty-seven".