11887391635623 has 12 divisors (see below), whose sum is σ = 19623630636688. Its totient is φ = 6792795220320.

The previous prime is 11887391635621. The next prime is 11887391635661. The reversal of 11887391635623 is 32653619378811.

11887391635623 is a `hidden beast` number, since 1 + 1 + 8 + 8 + 7 + 3 + 9 + 1 + 63 + 562 + 3 = 666.

It is not a de Polignac number, because 11887391635623 - 2¹ = 11887391635621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 188688756121 = 11887391635623 / (1 + 1 + 8 + 8 + 7 + 3 + 9 + 1 + 6 + 3 + 5 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11887391635621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94344377998 + ... + 94344378123.

Almost surely, 2^{11887391635623} is an apocalyptic number.

11887391635623 is a deficient number, since it is larger than the sum of its proper divisors (7736239001065).

11887391635623 is a wasteful number, since it uses less digits than its factorization.

11887391635623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188688756134 (or 188688756131 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 11887391635623 in words is "eleven trillion, eight hundred eighty-seven billion, three hundred ninety-one million, six hundred thirty-five thousand, six hundred twenty-three".