91470591568881 has 96 divisors (see below), whose sum is σ = 154990547712000. Its totient is φ = 50905334188800.

The previous prime is 91470591568843. The next prime is 91470591568883. The reversal of 91470591568881 is 18886519507419.

91470591568881 is a `hidden beast` number, since 9 + 1 + 4 + 7 + 0 + 59 + 1 + 568 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 91470591568881 - 2⁶ = 91470591568817 is a prime.

It is a super-2 number, since 2×91470591568881² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91470591568883) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5290060846 + ... + 5290078136.

It is an arithmetic number, because the mean of its divisors is an integer number (1614484872000).

Almost surely, 2^{91470591568881} is an apocalyptic number.

It is an amenable number.

91470591568881 is a deficient number, since it is larger than the sum of its proper divisors (63519956143119).

91470591568881 is a wasteful number, since it uses less digits than its factorization.

91470591568881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31707 (or 31704 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 72.

The spelling of 91470591568881 in words is "ninety-one trillion, four hundred seventy billion, five hundred ninety-one million, five hundred sixty-eight thousand, eight hundred eighty-one".