74539919117 has 2 divisors, whose sum is σ = 74539919118. Its totient is φ = 74539919116.

The previous prime is 74539919093. The next prime is 74539919123. The reversal of 74539919117 is 71191993547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74522994121 + 16924996 = 272989^2 + 4114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74539919117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74539919147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37269959558 + 37269959559.

It is an arithmetic number, because the mean of its divisors is an integer number (37269959559).

Almost surely, 2^74539919117 is an apocalyptic number.

It is an amenable number.

74539919117 is a deficient number, since it is larger than the sum of its proper divisors (1).

74539919117 is an equidigital number, since it uses as much as digits as its factorization.

74539919117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 56.

The spelling of 74539919117 in words is "seventy-four billion, five hundred thirty-nine million, nine hundred nineteen thousand, one hundred seventeen".