91834872580 has 48 divisors (see below), whose sum is σ = 213525458496. Its totient is φ = 32896068480.

The previous prime is 91834872557. The next prime is 91834872587. The reversal of 91834872580 is 8527843819.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (91834872587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100419 + ... + 3129898.

It is an arithmetic number, because the mean of its divisors is an integer number (4448447052).

Almost surely, 2^91834872580 is an apocalyptic number.

It is an amenable number.

91834872580 is an abundant number, since it is smaller than the sum of its proper divisors (121690585916).

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

91834872580 is a wasteful number, since it uses less digits than its factorization.

91834872580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230404 (or 6230402 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 91834872580 in words is "ninety-one billion, eight hundred thirty-four million, eight hundred seventy-two thousand, five hundred eighty".