91287479388 has 24 divisors (see below), whose sum is σ = 243433278592. Its totient is φ = 26082136944.

The previous prime is 91287479351. The next prime is 91287479407. The reversal of 91287479388 is 88397478219.

It is a congruent number.

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, 543377770 + ... + 543377937.

Almost surely, 2^91287479388 is an apocalyptic number.

It is an amenable number.

91287479388 is an abundant number, since it is smaller than the sum of its proper divisors (152145799204).

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

91287479388 is a wasteful number, since it uses less digits than its factorization.

91287479388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086755721 (or 1086755719 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 66.

The spelling of 91287479388 in words is "ninety-one billion, two hundred eighty-seven million, four hundred seventy-nine thousand, three hundred eighty-eight".