91133881512 has 32 divisors (see below), whose sum is σ = 228012360480. Its totient is φ = 30354272960.

The previous prime is 91133881483. The next prime is 91133881541. The reversal of 91133881512 is 21518833119.

It is an interprime number because it is at equal distance from previous prime (91133881483) and next prime (91133881541).

It is a super-2 number, since 2×91133881512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449039 + ... + 1510622.

It is an arithmetic number, because the mean of its divisors is an integer number (7125386265).

Almost surely, 2^91133881512 is an apocalyptic number.

It is an amenable number.

91133881512 is an abundant number, since it is smaller than the sum of its proper divisors (136878478968).

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

91133881512 is a wasteful number, since it uses less digits than its factorization.

91133881512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960953 (or 2960949 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The spelling of 91133881512 in words is "ninety-one billion, one hundred thirty-three million, eight hundred eighty-one thousand, five hundred twelve".