25257924285 has 32 divisors (see below), whose sum is σ = 44106301440. Its totient is φ = 12240782400.

The previous prime is 25257924271. The next prime is 25257924287. The reversal of 25257924285 is 58242975252.

It is a happy number.

It is not a de Polignac number, because 25257924285 - 2¹³ = 25257916093 is a prime.

It is a super-2 number, since 2×25257924285² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257924287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348196 + ... + 414434.

It is an arithmetic number, because the mean of its divisors is an integer number (1378321920).

Almost surely, 2^25257924285 is an apocalyptic number.

It is an amenable number.

25257924285 is a deficient number, since it is larger than the sum of its proper divisors (18848377155).

25257924285 is a wasteful number, since it uses less digits than its factorization.

25257924285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68569.

The product of its digits is 4032000, while the sum is 51.

The spelling of 25257924285 in words is "twenty-five billion, two hundred fifty-seven million, nine hundred twenty-four thousand, two hundred eighty-five".