91698921412 has 24 divisors (see below), whose sum is σ = 183414369600. Its totient is φ = 39295996320.

The previous prime is 91698921409. The next prime is 91698921443. The reversal of 91698921412 is 21412989619.

It is a self number, because there is not a number n which added to its sum of digits gives 91698921412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181587 + ... + 465157.

It is an arithmetic number, because the mean of its divisors is an integer number (7642265400).

Almost surely, 2^91698921412 is an apocalyptic number.

It is an amenable number.

91698921412 is an abundant number, since it is smaller than the sum of its proper divisors (91715448188).

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

91698921412 is a wasteful number, since it uses less digits than its factorization.

91698921412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295131 (or 295129 counting only the distinct ones).

The product of its digits is 559872, while the sum is 52.

The spelling of 91698921412 in words is "ninety-one billion, six hundred ninety-eight million, nine hundred twenty-one thousand, four hundred twelve".