25257785553 has 160 divisors (see below), whose sum is σ = 51019702272. Its totient is φ = 12025584000.

The previous prime is 25257785549. The next prime is 25257785621. The reversal of 25257785553 is 35558775252.

25257785553 is a `hidden beast` number, since 2 + 5 + 2 + 5 + 7 + 7 + 85 + 553 = 666.

It is not a de Polignac number, because 25257785553 - 2² = 25257785549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25257785553.

It is not an unprimeable number, because it can be changed into a prime (25257785503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 12242200 + ... + 12244262.

Almost surely, 2^25257785553 is an apocalyptic number.

It is an amenable number.

25257785553 is an abundant number, since it is smaller than the sum of its proper divisors (25761916719).

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

25257785553 is a wasteful number, since it uses less digits than its factorization.

25257785553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257 (or 2248 counting only the distinct ones).

The product of its digits is 14700000, while the sum is 54.

The spelling of 25257785553 in words is "twenty-five billion, two hundred fifty-seven million, seven hundred eighty-five thousand, five hundred fifty-three".