25481313125 has 10 divisors (see below), whose sum is σ = 31841449662. Its totient is φ = 20385050000.

The previous prime is 25481313083. The next prime is 25481313131. The reversal of 25481313125 is 52131318452.

It can be written as a sum of positive squares in 5 ways, for example, as 5957678596 + 19523634529 = 77186^2 + 139727^2 .

It is not a de Polignac number, because 25481313125 - 2¹⁸ = 25481050981 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 9 ways as a sum of consecutive naturals, for example, 20384426 + ... + 20385675.

Almost surely, 2^25481313125 is an apocalyptic number.

25481313125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25481313125 is a deficient number, since it is larger than the sum of its proper divisors (6360136537).

25481313125 is an frugal number, since it uses more digits than its factorization.

25481313125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40770121 (or 40770106 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The spelling of 25481313125 in words is "twenty-five billion, four hundred eighty-one million, three hundred thirteen thousand, one hundred twenty-five".