2566163156525 has 6 divisors (see below), whose sum is σ = 3182042314122. Its totient is φ = 2052930525200.

The previous prime is 2566163156489. The next prime is 2566163156527. The reversal of 2566163156525 is 5256513616652.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 123462985129 + 2442700171396 = 351373^2 + 1562914^2 .

It is not a de Polignac number, because 2566163156525 - 2⁶ = 2566163156461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566163156527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51323263106 + ... + 51323263155.

It is an arithmetic number, because the mean of its divisors is an integer number (530340385687).

Almost surely, 2^{2566163156525} is an apocalyptic number.

2566163156525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2566163156525 is a deficient number, since it is larger than the sum of its proper divisors (615879157597).

2566163156525 is a wasteful number, since it uses less digits than its factorization.

2566163156525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102646526271 (or 102646526266 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 53.

The spelling of 2566163156525 in words is "two trillion, five hundred sixty-six billion, one hundred sixty-three million, one hundred fifty-six thousand, five hundred twenty-five".