91986043392 has 160 divisors (see below), whose sum is σ = 272502648000. Its totient is φ = 30637522944.

The previous prime is 91986043343. The next prime is 91986043403. The reversal of 91986043392 is 29334068919.

91986043392 is a `hidden beast` number, since 9 + 198 + 60 + 4 + 3 + 392 = 666.

It is a super-2 number, since 2×91986043392² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 27881359 + ... + 27884657.

It is an arithmetic number, because the mean of its divisors is an integer number (1703141550).

Almost surely, 2^91986043392 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 91986043392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136251324000).

91986043392 is an abundant number, since it is smaller than the sum of its proper divisors (180516604608).

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

91986043392 is a wasteful number, since it uses less digits than its factorization.

91986043392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343 (or 5321 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 91986043392 in words is "ninety-one billion, nine hundred eighty-six million, forty-three thousand, three hundred ninety-two".