25777525525 has 12 divisors (see below), whose sum is σ = 32280611364. Its totient is φ = 20417840000.

The previous prime is 25777525519. The next prime is 25777525537. The reversal of 25777525525 is 52552577752.

It can be written as a sum of positive squares in 6 ways, for example, as 3985270641 + 21792254884 = 63129^2 + 147622^2 .

It is not a de Polignac number, because 25777525525 - 2¹⁵ = 25777492757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5101936 + ... + 5106985.

It is an arithmetic number, because the mean of its divisors is an integer number (2690050947).

Almost surely, 2^25777525525 is an apocalyptic number.

25777525525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25777525525 is a deficient number, since it is larger than the sum of its proper divisors (6503085839).

25777525525 is a wasteful number, since it uses less digits than its factorization.

25777525525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10209032 (or 10209027 counting only the distinct ones).

The product of its digits is 8575000, while the sum is 52.

The spelling of 25777525525 in words is "twenty-five billion, seven hundred seventy-seven million, five hundred twenty-five thousand, five hundred twenty-five".