25052542521 has 8 divisors (see below), whose sum is σ = 33549257280. Its totient is φ = 16628761392.

The previous prime is 25052542499. The next prime is 25052542589. The reversal of 25052542521 is 12524525052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25052542521 - 2⁶ = 25052542457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25052542721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18232605 + ... + 18233978.

It is an arithmetic number, because the mean of its divisors is an integer number (4193657160).

Almost surely, 2^25052542521 is an apocalyptic number.

It is an amenable number.

25052542521 is a deficient number, since it is larger than the sum of its proper divisors (8496714759).

25052542521 is a wasteful number, since it uses less digits than its factorization.

25052542521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36466815.

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 25052542521 in words is "twenty-five billion, fifty-two million, five hundred forty-two thousand, five hundred twenty-one".