25475642448 has 40 divisors (see below), whose sum is σ = 65977899168. Its totient is φ = 8470484352.

The previous prime is 25475642431. The next prime is 25475642461. The reversal of 25475642448 is 84424657452.

It is a self number, because there is not a number n which added to its sum of digits gives 25475642448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649386 + ... + 687497.

Almost surely, 2^25475642448 is an apocalyptic number.

It is an amenable number.

25475642448 is an abundant number, since it is smaller than the sum of its proper divisors (40502256720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25475642448 is a wasteful number, since it uses less digits than its factorization.

25475642448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337291 (or 1337285 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 51.

The spelling of 25475642448 in words is "twenty-five billion, four hundred seventy-five million, six hundred forty-two thousand, four hundred forty-eight".