91861123992960 has 256 divisors, whose sum is σ = 337707020851200. Its totient is φ = 20804196556800.

The previous prime is 91861123992901. The next prime is 91861123992991. The reversal of 91861123992960 is 6929932116819.

It is a super-2 number, since 2×91861123992960² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91861123992891 and 91861123992900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29887816 + ... + 32817735.

It is an arithmetic number, because the mean of its divisors is an integer number (1319168050200).

Almost surely, 2^{91861123992960} is an apocalyptic number.

It is an amenable number.

91861123992960 is an abundant number, since it is smaller than the sum of its proper divisors (245845896858240).

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

91861123992960 is a wasteful number, since it uses less digits than its factorization.

91861123992960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62705689 (or 62705677 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 66.

The spelling of 91861123992960 in words is "ninety-one trillion, eight hundred sixty-one billion, one hundred twenty-three million, nine hundred ninety-two thousand, nine hundred sixty".