91146031488 has 480 divisors, whose sum is σ = 303498419400. Its totient is φ = 27072921600.

The previous prime is 91146031463. The next prime is 91146031511. The reversal of 91146031488 is 88413064119.

It is a super-2 number, since 2×91146031488² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 56929888 + ... + 56931488.

Almost surely, 2^91146031488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91146031488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151749209700).

91146031488 is an abundant number, since it is smaller than the sum of its proper divisors (212352387912).

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

91146031488 is a wasteful number, since it uses less digits than its factorization.

91146031488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 91146031488 in words is "ninety-one billion, one hundred forty-six million, thirty-one thousand, four hundred eighty-eight".