11121756525 has 72 divisors (see below), whose sum is σ = 21802622400. Its totient is φ = 5374656000.

The previous prime is 11121756523. The next prime is 11121756551. The reversal of 11121756525 is 52565712111.

11121756525 is a `hidden beast` number, since 1 + 1 + 121 + 7 + 5 + 6 + 525 = 666.

11121756525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11121756525 - 2¹ = 11121756523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11121756525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121756523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 762501 + ... + 776949.

It is an arithmetic number, because the mean of its divisors is an integer number (302814200).

Almost surely, 2^11121756525 is an apocalyptic number.

11121756525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11121756525 is a deficient number, since it is larger than the sum of its proper divisors (10680865875).

11121756525 is a wasteful number, since it uses less digits than its factorization.

11121756525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14787 (or 14779 counting only the distinct ones).

The product of its digits is 21000, while the sum is 36.

The spelling of 11121756525 in words is "eleven billion, one hundred twenty-one million, seven hundred fifty-six thousand, five hundred twenty-five".