91689638200 has 48 divisors (see below), whose sum is σ = 215289133560. Its totient is φ = 36312720000.

The previous prime is 91689638171. The next prime is 91689638213. The reversal of 91689638200 is 283698619.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2249346 + ... + 2289745.

Almost surely, 2^91689638200 is an apocalyptic number.

It is an amenable number.

91689638200 is an abundant number, since it is smaller than the sum of its proper divisors (123599495360).

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

91689638200 is a wasteful number, since it uses less digits than its factorization.

91689638200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539208 (or 4539199 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 91689638200 in words is "ninety-one billion, six hundred eighty-nine million, six hundred thirty-eight thousand, two hundred".