91314438631 has 16 divisors (see below), whose sum is σ = 98597277856. Its totient is φ = 84068793216.

The previous prime is 91314438619. The next prime is 91314438667. The reversal of 91314438631 is 13683441319.

It is a cyclic number.

It is not a de Polignac number, because 91314438631 - 2¹⁷ = 91314307559 is a prime.

It is a super-2 number, since 2×91314438631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91314438731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11506741 + ... + 11514673.

It is an arithmetic number, because the mean of its divisors is an integer number (6162329866).

Almost surely, 2^91314438631 is an apocalyptic number.

91314438631 is a deficient number, since it is larger than the sum of its proper divisors (7282839225).

91314438631 is a wasteful number, since it uses less digits than its factorization.

91314438631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10162.

The product of its digits is 186624, while the sum is 43.

The spelling of 91314438631 in words is "ninety-one billion, three hundred fourteen million, four hundred thirty-eight thousand, six hundred thirty-one".