91070709864 has 64 divisors (see below), whose sum is σ = 241095052800. Its totient is φ = 28586937024.

The previous prime is 91070709853. The next prime is 91070709871. The reversal of 91070709864 is 46890707019.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521802 + ... + 674105.

It is an arithmetic number, because the mean of its divisors is an integer number (3767110200).

Almost surely, 2^91070709864 is an apocalyptic number.

It is an amenable number.

91070709864 is an abundant number, since it is smaller than the sum of its proper divisors (150024342936).

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

91070709864 is a wasteful number, since it uses less digits than its factorization.

91070709864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196102 (or 1196098 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 91070709864 in words is "ninety-one billion, seventy million, seven hundred nine thousand, eight hundred sixty-four".