9131886864 has 100 divisors (see below), whose sum is σ = 26492997916. Its totient is φ = 3036745728.

The previous prime is 9131886853. The next prime is 9131886871. The reversal of 9131886864 is 4686881319.

It can be written as a sum of positive squares in 2 ways, for example, as 5262051600 + 3869835264 = 72540^2 + 62208^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 9131886864.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 553032 + ... + 569304.

Almost surely, 2^9131886864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9131886864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13246498958).

9131886864 is an abundant number, since it is smaller than the sum of its proper divisors (17361111052).

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

9131886864 is a wasteful number, since it uses less digits than its factorization.

9131886864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16726 (or 16711 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 9131886864 is about 95560.9065674871. The cubic root of 9131886864 is about 2090.1951744961.

The spelling of 9131886864 in words is "nine billion, one hundred thirty-one million, eight hundred eighty-six thousand, eight hundred sixty-four".