25305025525 has 12 divisors (see below), whose sum is σ = 33791942212. Its totient is φ = 18686787840.

The previous prime is 25305025513. The next prime is 25305025631. The reversal of 25305025525 is 52552050352.

It can be written as a sum of positive squares in 6 ways, for example, as 2527877284 + 22777148241 = 50278^2 + 150921^2 .

It is not a de Polignac number, because 25305025525 - 2⁷ = 25305025397 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, 38930484 + ... + 38931133.

Almost surely, 2^25305025525 is an apocalyptic number.

25305025525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305025525 is a deficient number, since it is larger than the sum of its proper divisors (8486916687).

25305025525 is a wasteful number, since it uses less digits than its factorization.

25305025525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77861640 (or 77861635 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 34.

Adding to 25305025525 its reverse (52552050352), we get a palindrome (77857075877).

The spelling of 25305025525 in words is "twenty-five billion, three hundred five million, twenty-five thousand, five hundred twenty-five".