2136704891 has 8 divisors (see below), whose sum is σ = 2340407520. Its totient is φ = 1941670528.

The previous prime is 2136704887. The next prime is 2136704903. The reversal of 2136704891 is 1984076312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2136704891 - 2² = 2136704887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136704291) 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, 2166551 + ... + 2167536.

It is an arithmetic number, because the mean of its divisors is an integer number (292550940).

Almost surely, 2^2136704891 is an apocalyptic number.

2136704891 is a deficient number, since it is larger than the sum of its proper divisors (203702629).

2136704891 is a wasteful number, since it uses less digits than its factorization.

2136704891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334133.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 2136704891 is about 46224.5053083319. The cubic root of 2136704891 is about 1287.9969898451.

The spelling of 2136704891 in words is "two billion, one hundred thirty-six million, seven hundred four thousand, eight hundred ninety-one".