11615613231 has 32 divisors (see below), whose sum is σ = 16286054400. Its totient is φ = 7355111040.

The previous prime is 11615613211. The next prime is 11615613287. The reversal of 11615613231 is 13231651611.

It is not a de Polignac number, because 11615613231 - 2¹⁹ = 11615088943 is a prime.

It is a super-2 number, since 2×11615613231² (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 (11615613211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1079305 + ... + 1090013.

It is an arithmetic number, because the mean of its divisors is an integer number (508939200).

Almost surely, 2^11615613231 is an apocalyptic number.

11615613231 is a deficient number, since it is larger than the sum of its proper divisors (4670441169).

11615613231 is a wasteful number, since it uses less digits than its factorization.

11615613231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10959.

The product of its digits is 3240, while the sum is 30.

The spelling of 11615613231 in words is "eleven billion, six hundred fifteen million, six hundred thirteen thousand, two hundred thirty-one".