11878291765 has 16 divisors (see below), whose sum is σ = 15113781360. Its totient is φ = 8930995200.

The previous prime is 11878291751. The next prime is 11878291783. The reversal of 11878291765 is 56719287811.

It can be written as a sum of positive squares in 8 ways, for example, as 5574321 + 11872717444 = 2361^2 + 108962^2 .

It is not a de Polignac number, because 11878291765 - 2¹⁹ = 11877767477 is a prime.

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, 38286 + ... + 158815.

It is an arithmetic number, because the mean of its divisors is an integer number (944611335).

Almost surely, 2^11878291765 is an apocalyptic number.

It is an amenable number.

11878291765 is a deficient number, since it is larger than the sum of its proper divisors (3235489595).

11878291765 is a wasteful number, since it uses less digits than its factorization.

11878291765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197832.

The product of its digits is 1693440, while the sum is 55.

The spelling of 11878291765 in words is "eleven billion, eight hundred seventy-eight million, two hundred ninety-one thousand, seven hundred sixty-five".