91747198404 has 81 divisors (see below), whose sum is σ = 244857245997. Its totient is φ = 28961895168.

The previous prime is 91747198337. The next prime is 91747198447. The reversal of 91747198404 is 40489174719.

The square root of 91747198404 is 302898.

It is a perfect power (a square), and thus also a powerful number.

91747198404 is a `hidden beast` number, since 9 + 1 + 7 + 47 + 198 + 404 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59794920900 + 31952277504 = 244530^2 + 178752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34529044 + ... + 34531700.

Almost surely, 2^91747198404 is an apocalyptic number.

91747198404 is the 302898-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91747198404

91747198404 is an abundant number, since it is smaller than the sum of its proper divisors (153110047593).

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

91747198404 is a wasteful number, since it uses less digits than its factorization.

91747198404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362 (or 2681 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 91747198404 in words is "ninety-one billion, seven hundred forty-seven million, one hundred ninety-eight thousand, four hundred four".