91174797425 has 6 divisors (see below), whose sum is σ = 113056748838. Its totient is φ = 72939837920.

The previous prime is 91174797403. The next prime is 91174797449. The reversal of 91174797425 is 52479747119.

It can be written as a sum of positive squares in 3 ways, for example, as 8055601009 + 83119196416 = 89753^2 + 288304^2 .

It is not a de Polignac number, because 91174797425 - 2¹⁶ = 91174731889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1823495924 + ... + 1823495973.

It is an arithmetic number, because the mean of its divisors is an integer number (18842791473).

Almost surely, 2^91174797425 is an apocalyptic number.

It is an amenable number.

91174797425 is a deficient number, since it is larger than the sum of its proper divisors (21881951413).

91174797425 is a wasteful number, since it uses less digits than its factorization.

91174797425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646991907 (or 3646991902 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 56.

The spelling of 91174797425 in words is "ninety-one billion, one hundred seventy-four million, seven hundred ninety-seven thousand, four hundred twenty-five".