25204523525 has 6 divisors (see below), whose sum is σ = 31253609202. Its totient is φ = 20163618800.

The previous prime is 25204523507. The next prime is 25204523537. The reversal of 25204523525 is 52532540252.

It can be written as a sum of positive squares in 3 ways, for example, as 2134255204 + 23070268321 = 46198^2 + 151889^2 .

It is not a de Polignac number, because 25204523525 - 2¹² = 25204519429 is a prime.

It is a super-2 number, since 2×25204523525² (a number of 22 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 504090446 + ... + 504090495.

It is an arithmetic number, because the mean of its divisors is an integer number (5208934867).

Almost surely, 2^25204523525 is an apocalyptic number.

25204523525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25204523525 is a deficient number, since it is larger than the sum of its proper divisors (6049085677).

25204523525 is a wasteful number, since it uses less digits than its factorization.

25204523525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008180951 (or 1008180946 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 35.

The spelling of 25204523525 in words is "twenty-five billion, two hundred four million, five hundred twenty-three thousand, five hundred twenty-five".