52816666661825 has 24 divisors (see below), whose sum is σ = 71638091285376. Its totient is φ = 38309139576000.

The previous prime is 52816666661819. The next prime is 52816666661827.

It is a happy number.

52816666661825 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-52816666661825 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (52816666661827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257351321 + ... + 257556470.

It is an arithmetic number, because the mean of its divisors is an integer number (2984920470224).

Almost surely, 2^{52816666661825} is an apocalyptic number.

52816666661825 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

52816666661825 is a deficient number, since it is larger than the sum of its proper divisors (18821424623551).

52816666661825 is a wasteful number, since it uses less digits than its factorization.

52816666661825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514908185 (or 514908180 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 68.

The spelling of 52816666661825 in words is "fifty-two trillion, eight hundred sixteen billion, six hundred sixty-six million, six hundred sixty-one thousand, eight hundred twenty-five".