25542541525 has 6 divisors (see below), whose sum is σ = 31672751522. Its totient is φ = 20434033200.

The previous prime is 25542541501. The next prime is 25542541553. The reversal of 25542541525 is 52514524552.

It can be written as a sum of positive squares in 3 ways, for example, as 4146458449 + 21396083076 = 64393^2 + 146274^2 .

It is not a de Polignac number, because 25542541525 - 2⁷ = 25542541397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 510850806 + ... + 510850855.

Almost surely, 2^25542541525 is an apocalyptic number.

25542541525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25542541525 is a deficient number, since it is larger than the sum of its proper divisors (6130209997).

25542541525 is a wasteful number, since it uses less digits than its factorization.

25542541525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021701671 (or 1021701666 counting only the distinct ones).

The product of its digits is 400000, while the sum is 40.

The spelling of 25542541525 in words is "twenty-five billion, five hundred forty-two million, five hundred forty-one thousand, five hundred twenty-five".