91849864020 has 48 divisors (see below), whose sum is σ = 257205957120. Its totient is φ = 24490788736.

The previous prime is 91849863979. The next prime is 91849864033. The reversal of 91849864020 is 2046894819.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554626 + ... + 700934.

It is an arithmetic number, because the mean of its divisors is an integer number (5358457440).

Almost surely, 2^91849864020 is an apocalyptic number.

It is an amenable number.

91849864020 is an abundant number, since it is smaller than the sum of its proper divisors (165356093100).

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

91849864020 is a wasteful number, since it uses less digits than its factorization.

91849864020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156784 (or 156782 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 91849864020 in words is "ninety-one billion, eight hundred forty-nine million, eight hundred sixty-four thousand, twenty".