91308502885 has 32 divisors (see below), whose sum is σ = 120080413440. Its totient is φ = 66343646208.

The previous prime is 91308502877. The next prime is 91308502889. The reversal of 91308502885 is 58820580319.

It is not a de Polignac number, because 91308502885 - 2³ = 91308502877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91308502889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5125704 + ... + 5143486.

It is an arithmetic number, because the mean of its divisors is an integer number (3752512920).

Almost surely, 2^91308502885 is an apocalyptic number.

It is an amenable number.

91308502885 is a deficient number, since it is larger than the sum of its proper divisors (28771910555).

91308502885 is a wasteful number, since it uses less digits than its factorization.

91308502885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19917.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 91308502885 in words is "ninety-one billion, three hundred eight million, five hundred two thousand, eight hundred eighty-five".