11859703681 has 6 divisors (see below), whose sum is σ = 13795981890. Its totient is φ = 10165460256.

The previous prime is 11859703627. The next prime is 11859703703. The reversal of 11859703681 is 18630795811.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11833088400 + 26615281 = 108780^2 + 5159^2 .

It is not a de Polignac number, because 11859703681 - 2⁷ = 11859703553 is a prime.

It is a super-2 number, since 2×11859703681² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 242034769 = 11859703681 / (1 + 1 + 8 + 5 + 9 + 7 + 0 + 3 + 6 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11859703181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121017336 + ... + 121017433.

It is an arithmetic number, because the mean of its divisors is an integer number (2299330315).

Almost surely, 2^11859703681 is an apocalyptic number.

It is an amenable number.

11859703681 is a deficient number, since it is larger than the sum of its proper divisors (1936278209).

11859703681 is an equidigital number, since it uses as much as digits as its factorization.

11859703681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242034783 (or 242034776 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 11859703681 in words is "eleven billion, eight hundred fifty-nine million, seven hundred three thousand, six hundred eighty-one".