11807578871 has 32 divisors (see below), whose sum is σ = 14344667136. Its totient is φ = 9592128000.

The previous prime is 11807578843. The next prime is 11807578877. The reversal of 11807578871 is 17887570811.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11807578871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11807578877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288026 + ... + 326456.

It is an arithmetic number, because the mean of its divisors is an integer number (448270848).

Almost surely, 2^11807578871 is an apocalyptic number.

11807578871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11807578871 is a deficient number, since it is larger than the sum of its proper divisors (2537088265).

11807578871 is a wasteful number, since it uses less digits than its factorization.

11807578871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38543.

The product of its (nonzero) digits is 878080, while the sum is 53.

The spelling of 11807578871 in words is "eleven billion, eight hundred seven million, five hundred seventy-eight thousand, eight hundred seventy-one".