11518572825 has 72 divisors (see below), whose sum is σ = 21746911680. Its totient is φ = 5811868800.

The previous prime is 11518572811. The next prime is 11518572829. The reversal of 11518572825 is 52827581511.

It is a happy number.

11518572825 is a `hidden beast` number, since 1 + 1 + 51 + 8 + 572 + 8 + 25 = 666.

It is not a de Polignac number, because 11518572825 - 2⁹ = 11518572313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (11518572829) 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 71 ways as a sum of consecutive naturals, for example, 4200955 + ... + 4203695.

It is an arithmetic number, because the mean of its divisors is an integer number (302040440).

Almost surely, 2^11518572825 is an apocalyptic number.

11518572825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11518572825 is a deficient number, since it is larger than the sum of its proper divisors (10228338855).

11518572825 is a wasteful number, since it uses less digits than its factorization.

11518572825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759 (or 3751 counting only the distinct ones).

The product of its digits is 224000, while the sum is 45.

The spelling of 11518572825 in words is "eleven billion, five hundred eighteen million, five hundred seventy-two thousand, eight hundred twenty-five".