11631587915 has 4 divisors (see below), whose sum is σ = 13957905504. Its totient is φ = 9305270328.

The previous prime is 11631587897. The next prime is 11631587927. The reversal of 11631587915 is 51978513611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11631587915 - 2⁸ = 11631587659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11631587915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163158787 + ... + 1163158796.

It is an arithmetic number, because the mean of its divisors is an integer number (3489476376).

Almost surely, 2^11631587915 is an apocalyptic number.

11631587915 is a deficient number, since it is larger than the sum of its proper divisors (2326317589).

11631587915 is an equidigital number, since it uses as much as digits as its factorization.

11631587915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326317588.

The product of its digits is 226800, while the sum is 47.

The spelling of 11631587915 in words is "eleven billion, six hundred thirty-one million, five hundred eighty-seven thousand, nine hundred fifteen".