25255225647 has 48 divisors (see below), whose sum is σ = 39354002688. Its totient is φ = 15567552000.

The previous prime is 25255225643. The next prime is 25255225703. The reversal of 25255225647 is 74652255252.

25255225647 is a `hidden beast` number, since 2 + 5 + 2 + 552 + 2 + 56 + 47 = 666.

It is not a de Polignac number, because 25255225647 - 2² = 25255225643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255225643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 848772 + ... + 878022.

It is an arithmetic number, because the mean of its divisors is an integer number (819875056).

Almost surely, 2^25255225647 is an apocalyptic number.

25255225647 is a deficient number, since it is larger than the sum of its proper divisors (14098777041).

25255225647 is a wasteful number, since it uses less digits than its factorization.

25255225647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29420 (or 29417 counting only the distinct ones).

The product of its digits is 1680000, while the sum is 45.

The spelling of 25255225647 in words is "twenty-five billion, two hundred fifty-five million, two hundred twenty-five thousand, six hundred forty-seven".