11857015631 has 2 divisors, whose sum is σ = 11857015632. Its totient is φ = 11857015630.

The previous prime is 11857015627. The next prime is 11857015679. The reversal of 11857015631 is 13651075811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11857015631 - 2² = 11857015627 is a prime.

It is a super-2 number, since 2×11857015631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11857015031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928507815 + 5928507816.

It is an arithmetic number, because the mean of its divisors is an integer number (5928507816).

Almost surely, 2^11857015631 is an apocalyptic number.

11857015631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11857015631 is an equidigital number, since it uses as much as digits as its factorization.

11857015631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 11857015631 in words is "eleven billion, eight hundred fifty-seven million, fifteen thousand, six hundred thirty-one".