11999072351631 has 8 divisors (see below), whose sum is σ = 16694361532800. Its totient is φ = 7651582369112.

The previous prime is 11999072351597. The next prime is 11999072351641. The reversal of 11999072351631 is 13615327099911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11999072351631 - 2¹⁹ = 11999071827343 is a prime.

It is a super-2 number, since 2×11999072351631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999072351641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86949799581 + ... + 86949799718.

It is an arithmetic number, because the mean of its divisors is an integer number (2086795191600).

Almost surely, 2^{11999072351631} is an apocalyptic number.

11999072351631 is a deficient number, since it is larger than the sum of its proper divisors (4695289181169).

11999072351631 is a wasteful number, since it uses less digits than its factorization.

11999072351631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173899599325.

The product of its (nonzero) digits is 2755620, while the sum is 57.

The spelling of 11999072351631 in words is "eleven trillion, nine hundred ninety-nine billion, seventy-two million, three hundred fifty-one thousand, six hundred thirty-one".