2051000645 has 16 divisors (see below), whose sum is σ = 2480889600. Its totient is φ = 1627704000.

The previous prime is 2051000629. The next prime is 2051000663. The reversal of 2051000645 is 5460001502.

It is not a de Polignac number, because 2051000645 - 2⁴ = 2051000629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2051000645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871220 + ... + 873570.

It is an arithmetic number, because the mean of its divisors is an integer number (155055600).

Almost surely, 2^2051000645 is an apocalyptic number.

It is an amenable number.

2051000645 is a deficient number, since it is larger than the sum of its proper divisors (429888955).

2051000645 is a wasteful number, since it uses less digits than its factorization.

2051000645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2051000645 is about 45287.9746179932. The cubic root of 2051000645 is about 1270.5407507708.

The spelling of 2051000645 in words is "two billion, fifty-one million, six hundred forty-five", and thus it is an aban number.