91801701672 has 32 divisors (see below), whose sum is σ = 229902043200. Its totient is φ = 30547528704.

The previous prime is 91801701653. The next prime is 91801701689. The reversal of 91801701672 is 27610710819.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3300772 + ... + 3328467.

It is an arithmetic number, because the mean of its divisors is an integer number (7184438850).

Almost surely, 2^91801701672 is an apocalyptic number.

It is an amenable number.

91801701672 is an abundant number, since it is smaller than the sum of its proper divisors (138100341528).

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

91801701672 is a wasteful number, since it uses less digits than its factorization.

91801701672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629825 (or 6629821 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 42.

The spelling of 91801701672 in words is "ninety-one billion, eight hundred one million, seven hundred one thousand, six hundred seventy-two".