11857659405 has 16 divisors (see below), whose sum is σ = 19434993984. Its totient is φ = 6169838720.

The previous prime is 11857659389. The next prime is 11857659431. The reversal of 11857659405 is 50495675811.

It is not a de Polignac number, because 11857659405 - 2⁴ = 11857659389 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 9639759 + ... + 9640988.

It is an arithmetic number, because the mean of its divisors is an integer number (1214687124).

Almost surely, 2^11857659405 is an apocalyptic number.

11857659405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11857659405 is a deficient number, since it is larger than the sum of its proper divisors (7577334579).

11857659405 is a wasteful number, since it uses less digits than its factorization.

11857659405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19280796.

The product of its (nonzero) digits is 1512000, while the sum is 51.

The spelling of 11857659405 in words is "eleven billion, eight hundred fifty-seven million, six hundred fifty-nine thousand, four hundred five".