91885058561388 has 48 divisors (see below), whose sum is σ = 214797260160000. Its totient is φ = 30571432402368.

The previous prime is 91885058561323. The next prime is 91885058561441. The reversal of 91885058561388 is 88316585058819.

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, 11735938 + ... + 17930486.

It is an arithmetic number, because the mean of its divisors is an integer number (4474942920000).

Almost surely, 2^{91885058561388} is an apocalyptic number.

It is an amenable number.

91885058561388 is an abundant number, since it is smaller than the sum of its proper divisors (122912201598612).

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

91885058561388 is a wasteful number, since it uses less digits than its factorization.

91885058561388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6196854 (or 6196852 counting only the distinct ones).

The product of its (nonzero) digits is 663552000, while the sum is 75.

The spelling of 91885058561388 in words is "ninety-one trillion, eight hundred eighty-five billion, fifty-eight million, five hundred sixty-one thousand, three hundred eighty-eight".