11812731637 has 16 divisors (see below), whose sum is σ = 13794105600. Its totient is φ = 9905905152.

The previous prime is 11812731631. The next prime is 11812731647. The reversal of 11812731637 is 73613721811.

It is a cyclic number.

It is not a de Polignac number, because 11812731637 - 2¹¹ = 11812729589 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 11812731637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812731631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 85864 + ... + 176062.

It is an arithmetic number, because the mean of its divisors is an integer number (862131600).

Almost surely, 2^11812731637 is an apocalyptic number.

It is an amenable number.

11812731637 is a deficient number, since it is larger than the sum of its proper divisors (1981373963).

11812731637 is an equidigital number, since it uses as much as digits as its factorization.

11812731637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90612.

The product of its digits is 42336, while the sum is 40.

The spelling of 11812731637 in words is "eleven billion, eight hundred twelve million, seven hundred thirty-one thousand, six hundred thirty-seven".