2501581164 has 24 divisors (see below), whose sum is σ = 5851736688. Its totient is φ = 831758400.

The previous prime is 2501581163. The next prime is 2501581169. The reversal of 2501581164 is 4611851052.

It is not an unprimeable number, because it can be changed into a prime (2501581163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257787 + ... + 267314.

It is an arithmetic number, because the mean of its divisors is an integer number (243822362).

Almost surely, 2^2501581164 is an apocalyptic number.

It is an amenable number.

2501581164 is an abundant number, since it is smaller than the sum of its proper divisors (3350155524).

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

2501581164 is a wasteful number, since it uses less digits than its factorization.

2501581164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525505 (or 525503 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 2501581164 is about 50015.8091407107. The cubic root of 2501581164 is about 1357.4948772907.

The spelling of 2501581164 in words is "two billion, five hundred one million, five hundred eighty-one thousand, one hundred sixty-four".