91270233288 has 72 divisors (see below), whose sum is σ = 267667546770. Its totient is φ = 28083144960.

The previous prime is 91270233287. The next prime is 91270233293. The reversal of 91270233288 is 88233207219.

It can be written as a sum of positive squares in 3 ways, for example, as 66325821444 + 24944411844 = 257538^2 + 157938^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91270233287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3738253 + ... + 3762588.

Almost surely, 2^91270233288 is an apocalyptic number.

It is an amenable number.

91270233288 is an abundant number, since it is smaller than the sum of its proper divisors (176397313482).

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

91270233288 is a wasteful number, since it uses less digits than its factorization.

91270233288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500879 (or 7500859 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 91270233288 in words is "ninety-one billion, two hundred seventy million, two hundred thirty-three thousand, two hundred eighty-eight".