11807988685 has 8 divisors (see below), whose sum is σ = 14401875096. Its totient is φ = 9291531840.

The previous prime is 11807988677. The next prime is 11807988749. The reversal of 11807988685 is 58688970811.

It can be written as a sum of positive squares in 4 ways, for example, as 10118761 + 11797869924 = 3181^2 + 108618^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11807988685 - 2³ = 11807988677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

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 7 ways as a sum of consecutive naturals, for example, 19357054 + ... + 19357663.

It is an arithmetic number, because the mean of its divisors is an integer number (1800234387).

Almost surely, 2^11807988685 is an apocalyptic number.

It is an amenable number.

11807988685 is a deficient number, since it is larger than the sum of its proper divisors (2593886411).

11807988685 is an equidigital number, since it uses as much as digits as its factorization.

11807988685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38714783.

The product of its (nonzero) digits is 7741440, while the sum is 61.

The spelling of 11807988685 in words is "eleven billion, eight hundred seven million, nine hundred eighty-eight thousand, six hundred eighty-five".