11631385687 has 2 divisors, whose sum is σ = 11631385688. Its totient is φ = 11631385686.

The previous prime is 11631385621. The next prime is 11631385697. The reversal of 11631385687 is 78658313611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11631385687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11631385687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11631385697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5815692843 + 5815692844.

It is an arithmetic number, because the mean of its divisors is an integer number (5815692844).

Almost surely, 2^11631385687 is an apocalyptic number.

11631385687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11631385687 is an equidigital number, since it uses as much as digits as its factorization.

11631385687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The spelling of 11631385687 in words is "eleven billion, six hundred thirty-one million, three hundred eighty-five thousand, six hundred eighty-seven".