91056473694 has 48 divisors (see below), whose sum is σ = 199736325360. Its totient is φ = 29976439680.

The previous prime is 91056473633. The next prime is 91056473731. The reversal of 91056473694 is 49637465019.

91056473694 is a `hidden beast` number, since 9 + 1 + 0 + 564 + 73 + 6 + 9 + 4 = 666.

It is a super-2 number, since 2×91056473694² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91056473694.

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 23 ways as a sum of consecutive naturals, for example, 1372549 + ... + 1437359.

It is an arithmetic number, because the mean of its divisors is an integer number (4161173445).

Almost surely, 2^91056473694 is an apocalyptic number.

91056473694 is an abundant number, since it is smaller than the sum of its proper divisors (108679851666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91056473694 is a wasteful number, since it uses less digits than its factorization.

91056473694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65785 (or 65782 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 91056473694 in words is "ninety-one billion, fifty-six million, four hundred seventy-three thousand, six hundred ninety-four".