11558530661872 has 80 divisors (see below), whose sum is σ = 22897591647840. Its totient is φ = 5650960896000.

The previous prime is 11558530661869. The next prime is 11558530661891. The reversal of 11558530661872 is 27816603585511.

11558530661872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11558530661872² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113757972 + ... + 113859532.

It is an arithmetic number, because the mean of its divisors is an integer number (286219895598).

Almost surely, 2^{11558530661872} is an apocalyptic number.

It is an amenable number.

11558530661872 is a deficient number, since it is larger than the sum of its proper divisors (11339060985968).

11558530661872 is a wasteful number, since it uses less digits than its factorization.

11558530661872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102482 (or 102476 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 58.

The spelling of 11558530661872 in words is "eleven trillion, five hundred fifty-eight billion, five hundred thirty million, six hundred sixty-one thousand, eight hundred seventy-two".