2681785887 has 32 divisors (see below), whose sum is σ = 4158086400. Its totient is φ = 1519403520.

The previous prime is 2681785867. The next prime is 2681785891. The reversal of 2681785887 is 7885871862.

It is not a de Polignac number, because 2681785887 - 2²² = 2677591583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2681785887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681785867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67548 + ... + 99630.

It is an arithmetic number, because the mean of its divisors is an integer number (129940200).

Almost surely, 2^2681785887 is an apocalyptic number.

2681785887 is a deficient number, since it is larger than the sum of its proper divisors (1476300513).

2681785887 is a wasteful number, since it uses less digits than its factorization.

2681785887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32263.

The product of its digits is 12042240, while the sum is 60.

The square root of 2681785887 is about 51785.9622581255. The cubic root of 2681785887 is about 1389.3383817123.

The spelling of 2681785887 in words is "two billion, six hundred eighty-one million, seven hundred eighty-five thousand, eight hundred eighty-seven".