91009967752108 has 12 divisors (see below), whose sum is σ = 162971337602920. Its totient is φ = 44446728436992.

The previous prime is 91009967752091. The next prime is 91009967752139. The reversal of 91009967752108 is 80125776990019.

It is a self number, because there is not a number n which added to its sum of digits gives 91009967752108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264563859573 + ... + 264563859916.

Almost surely, 2^{91009967752108} is an apocalyptic number.

It is an amenable number.

91009967752108 is a deficient number, since it is larger than the sum of its proper divisors (71961369850812).

91009967752108 is a wasteful number, since it uses less digits than its factorization.

91009967752108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529127719536 (or 529127719534 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 64.

The spelling of 91009967752108 in words is "ninety-one trillion, nine billion, nine hundred sixty-seven million, seven hundred fifty-two thousand, one hundred eight".