11515612023 has 16 divisors (see below), whose sum is σ = 17211145440. Its totient is φ = 7609133952.

The previous prime is 11515612021. The next prime is 11515612057. The reversal of 11515612023 is 32021651511.

11515612023 is a `hidden beast` number, since 1 + 1 + 515 + 6 + 120 + 23 = 666.

It is not a de Polignac number, because 11515612023 - 2¹ = 11515612021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515612021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1884136 + ... + 1890237.

It is an arithmetic number, because the mean of its divisors is an integer number (1075696590).

Almost surely, 2^11515612023 is an apocalyptic number.

11515612023 is a deficient number, since it is larger than the sum of its proper divisors (5695533417).

11515612023 is a wasteful number, since it uses less digits than its factorization.

11515612023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774495 (or 3774489 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 11515612023 in words is "eleven billion, five hundred fifteen million, six hundred twelve thousand, twenty-three".