11973135831 has 8 divisors (see below), whose sum is σ = 15973399920. Its totient is φ = 7977481152.

The previous prime is 11973135827. The next prime is 11973135851. The reversal of 11973135831 is 13853137911.

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

It is not a de Polignac number, because 11973135831 - 2² = 11973135827 is a prime.

It is a super-2 number, since 2×11973135831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973135821) 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, 1146286 + ... + 1156683.

It is an arithmetic number, because the mean of its divisors is an integer number (1996674990).

Almost surely, 2^11973135831 is an apocalyptic number.

11973135831 is a deficient number, since it is larger than the sum of its proper divisors (4000264089).

11973135831 is a wasteful number, since it uses less digits than its factorization.

11973135831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304705.

The product of its digits is 68040, while the sum is 42.

The spelling of 11973135831 in words is "eleven billion, nine hundred seventy-three million, one hundred thirty-five thousand, eight hundred thirty-one".