2051637805 has 16 divisors (see below), whose sum is σ = 2830944384. Its totient is φ = 1398202560.

The previous prime is 2051637787. The next prime is 2051637839. The reversal of 2051637805 is 5087361502.

It is not a de Polignac number, because 2051637805 - 2⁵ = 2051637773 is a prime.

It is a Duffinian number.

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, 174106 + ... + 185515.

It is an arithmetic number, because the mean of its divisors is an integer number (176934024).

Almost surely, 2^2051637805 is an apocalyptic number.

It is an amenable number.

2051637805 is a deficient number, since it is larger than the sum of its proper divisors (779306579).

2051637805 is a wasteful number, since it uses less digits than its factorization.

2051637805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359796.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 2051637805 is about 45295.0086102211. The cubic root of 2051637805 is about 1270.6723050816.

The spelling of 2051637805 in words is "two billion, fifty-one million, six hundred thirty-seven thousand, eight hundred five".