2111556616125 has 48 divisors (see below), whose sum is σ = 3862089486528. Its totient is φ = 1023785004000.

The previous prime is 2111556616097. The next prime is 2111556616139. The reversal of 2111556616125 is 5216166551112.

It is not a de Polignac number, because 2111556616125 - 2⁶ = 2111556616061 is a prime.

It is a super-2 number, since 2×2111556616125² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23222467 + ... + 23313216.

It is an arithmetic number, because the mean of its divisors is an integer number (80460197636).

Almost surely, 2^{2111556616125} is an apocalyptic number.

2111556616125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2111556616125 is a deficient number, since it is larger than the sum of its proper divisors (1750532870403).

2111556616125 is a wasteful number, since it uses less digits than its factorization.

2111556616125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46535723 (or 46535702 counting only the distinct ones).

The product of its digits is 108000, while the sum is 42.

The spelling of 2111556616125 in words is "two trillion, one hundred eleven billion, five hundred fifty-six million, six hundred sixteen thousand, one hundred twenty-five".