2051908764 has 12 divisors (see below), whose sum is σ = 4787787144. Its totient is φ = 683969584.

The previous prime is 2051908739. The next prime is 2051908769. The reversal of 2051908764 is 4678091502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051908769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85496187 + ... + 85496210.

It is an arithmetic number, because the mean of its divisors is an integer number (398982262).

Almost surely, 2^2051908764 is an apocalyptic number.

It is an amenable number.

2051908764 is an abundant number, since it is smaller than the sum of its proper divisors (2735878380).

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

2051908764 is a wasteful number, since it uses less digits than its factorization.

2051908764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170992404 (or 170992402 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 2051908764 is about 45297.9995584794. Note that the first 3 decimals coincide. The cubic root of 2051908764 is about 1270.7282416835.

The spelling of 2051908764 in words is "two billion, fifty-one million, nine hundred eight thousand, seven hundred sixty-four".