2051765859 has 16 divisors (see below), whose sum is σ = 3213955584. Its totient is φ = 1147840800.

The previous prime is 2051765831. The next prime is 2051765867. The reversal of 2051765859 is 9585671502.

It is a happy number.

It is not a de Polignac number, because 2051765859 - 2⁵ = 2051765827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051765809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2390907 + ... + 2391764.

It is an arithmetic number, because the mean of its divisors is an integer number (200872224).

Almost surely, 2^2051765859 is an apocalyptic number.

2051765859 is a deficient number, since it is larger than the sum of its proper divisors (1162189725).

2051765859 is a wasteful number, since it uses less digits than its factorization.

2051765859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782698.

The product of its (nonzero) digits is 756000, while the sum is 48.

The square root of 2051765859 is about 45296.4221434762. The cubic root of 2051765859 is about 1270.6987410808.

The spelling of 2051765859 in words is "two billion, fifty-one million, seven hundred sixty-five thousand, eight hundred fifty-nine".