91538444260 has 12 divisors (see below), whose sum is σ = 192230732988. Its totient is φ = 36615377696.

The previous prime is 91538444219. The next prime is 91538444281. The reversal of 91538444260 is 6244483519.

It can be written as a sum of positive squares in 2 ways, for example, as 10439934976 + 81098509284 = 102176^2 + 284778^2 .

It is a super-2 number, since 2×91538444260² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91538444260.

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 3 ways as a sum of consecutive naturals, for example, 2288461087 + ... + 2288461126.

It is an arithmetic number, because the mean of its divisors is an integer number (16019227749).

Almost surely, 2^91538444260 is an apocalyptic number.

It is an amenable number.

91538444260 is an abundant number, since it is smaller than the sum of its proper divisors (100692288728).

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

91538444260 is a wasteful number, since it uses less digits than its factorization.

91538444260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576922222 (or 4576922220 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 91538444260 in words is "ninety-one billion, five hundred thirty-eight million, four hundred forty-four thousand, two hundred sixty".