91974554031 has 32 divisors (see below), whose sum is σ = 127085156352. Its totient is φ = 59127556320.

The previous prime is 91974554029. The next prime is 91974554041. The reversal of 91974554031 is 13045547919.

It is not a de Polignac number, because 91974554031 - 2¹ = 91974554029 is a prime.

It is a super-2 number, since 2×91974554031² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91974554041) 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 in 31 ways as a sum of consecutive naturals, for example, 25384486 + ... + 25388108.

It is an arithmetic number, because the mean of its divisors is an integer number (3971411136).

Almost surely, 2^91974554031 is an apocalyptic number.

91974554031 is a deficient number, since it is larger than the sum of its proper divisors (35110602321).

91974554031 is a wasteful number, since it uses less digits than its factorization.

91974554031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 91974554031 in words is "ninety-one billion, nine hundred seventy-four million, five hundred fifty-four thousand, thirty-one".