25611553225 has 12 divisors (see below), whose sum is σ = 31770176400. Its totient is φ = 20481597200.

The previous prime is 25611553213. The next prime is 25611553243. The reversal of 25611553225 is 52235511652.

It is not a de Polignac number, because 25611553225 - 2²³ = 25603164617 is a prime.

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, 122311 + ... + 257260.

It is an arithmetic number, because the mean of its divisors is an integer number (2647514700).

Almost surely, 2^25611553225 is an apocalyptic number.

25611553225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25611553225 is a deficient number, since it is larger than the sum of its proper divisors (6158623175).

25611553225 is a wasteful number, since it uses less digits than its factorization.

25611553225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382280 (or 382275 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The spelling of 25611553225 in words is "twenty-five billion, six hundred eleven million, five hundred fifty-three thousand, two hundred twenty-five".