11658812031 has 10 divisors (see below), whose sum is σ = 17416250192. Its totient is φ = 7772541300.

The previous prime is 11658812027. The next prime is 11658812063. The reversal of 11658812031 is 13021885611.

It is not a de Polignac number, because 11658812031 - 2² = 11658812027 is a prime.

It is a super-2 number, since 2×11658812031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11658812131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 71967895 + ... + 71968056.

Almost surely, 2^11658812031 is an apocalyptic number.

11658812031 is a deficient number, since it is larger than the sum of its proper divisors (5757438161).

11658812031 is an equidigital number, since it uses as much as digits as its factorization.

11658812031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143935963 (or 143935954 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 11658812031 in words is "eleven billion, six hundred fifty-eight million, eight hundred twelve thousand, thirty-one".