91955964906 has 40 divisors (see below), whose sum is σ = 221899441764. Its totient is φ = 28294142400.

The previous prime is 91955964899. The next prime is 91955964907. The reversal of 91955964906 is 60946955919.

91955964906 is a `hidden beast` number, since 9 + 1 + 9 + 55 + 96 + 490 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91581890625 + 374074281 = 302625^2 + 19341^2 .

It is not an unprimeable number, because it can be changed into a prime (91955964907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21829795 + ... + 21834006.

Almost surely, 2^91955964906 is an apocalyptic number.

91955964906 is an abundant number, since it is smaller than the sum of its proper divisors (129943476858).

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

91955964906 is a wasteful number, since it uses less digits than its factorization.

91955964906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43663828 (or 43663819 counting only the distinct ones).

The product of its (nonzero) digits is 23619600, while the sum is 63.

The spelling of 91955964906 in words is "ninety-one billion, nine hundred fifty-five million, nine hundred sixty-four thousand, nine hundred six".