2136928581 has 8 divisors (see below), whose sum is σ = 3165820160. Its totient is φ = 1424619036.

The previous prime is 2136928579. The next prime is 2136928589. The reversal of 2136928581 is 1858296312.

2136928581 is a `hidden beast` number, since 2 + 1 + 3 + 69 + 2 + 8 + 581 = 666.

It is not a de Polignac number, because 2136928581 - 2¹ = 2136928579 is a prime.

It is a super-2 number, since 2×2136928581² = 9132927520589347122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136928589) 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, 39572725 + ... + 39572778.

It is an arithmetic number, because the mean of its divisors is an integer number (395727520).

Almost surely, 2^2136928581 is an apocalyptic number.

It is an amenable number.

2136928581 is a deficient number, since it is larger than the sum of its proper divisors (1028891579).

2136928581 is an equidigital number, since it uses as much as digits as its factorization.

2136928581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79145512 (or 79145506 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2136928581 is about 46226.9248490531. The cubic root of 2136928581 is about 1288.0419347499.

The spelling of 2136928581 in words is "two billion, one hundred thirty-six million, nine hundred twenty-eight thousand, five hundred eighty-one".