91312437725 has 12 divisors (see below), whose sum is σ = 119186761440. Its totient is φ = 69205215600.

The previous prime is 91312437719. The next prime is 91312437757. The reversal of 91312437725 is 52773421319.

It is not a de Polignac number, because 91312437725 - 2⁶ = 91312437661 is a prime.

It is a super-2 number, since 2×91312437725² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 96117881 + ... + 96118830.

It is an arithmetic number, because the mean of its divisors is an integer number (9932230120).

Almost surely, 2^91312437725 is an apocalyptic number.

91312437725 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91312437725 is a deficient number, since it is larger than the sum of its proper divisors (27874323715).

91312437725 is a wasteful number, since it uses less digits than its factorization.

91312437725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192236740 (or 192236735 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The spelling of 91312437725 in words is "ninety-one billion, three hundred twelve million, four hundred thirty-seven thousand, seven hundred twenty-five".