11631587913 has 24 divisors (see below), whose sum is σ = 18345263040. Its totient is φ = 7043024160.

The previous prime is 11631587897. The next prime is 11631587927. The reversal of 11631587913 is 31978513611.

11631587913 is a `hidden beast` number, since 1 + 1 + 63 + 1 + 587 + 9 + 1 + 3 = 666.

It is not a de Polignac number, because 11631587913 - 2⁴ = 11631587897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11631587953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56820 + ... + 162762.

It is an arithmetic number, because the mean of its divisors is an integer number (764385960).

Almost surely, 2^11631587913 is an apocalyptic number.

It is an amenable number.

11631587913 is a deficient number, since it is larger than the sum of its proper divisors (6713675127).

11631587913 is a wasteful number, since it uses less digits than its factorization.

11631587913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107069 (or 107066 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 11631587913 in words is "eleven billion, six hundred thirty-one million, five hundred eighty-seven thousand, nine hundred thirteen".