25285497426 has 48 divisors (see below), whose sum is σ = 65907067200. Its totient is φ = 6844194144.

The previous prime is 25285497353. The next prime is 25285497443. The reversal of 25285497426 is 62479458252.

25285497426 is a `hidden beast` number, since 2 + 5 + 2 + 8 + 549 + 74 + 26 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5278621 + ... + 5283408.

It is an arithmetic number, because the mean of its divisors is an integer number (1373063900).

Almost surely, 2^25285497426 is an apocalyptic number.

25285497426 is an abundant number, since it is smaller than the sum of its proper divisors (40621569774).

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

25285497426 is a wasteful number, since it uses less digits than its factorization.

25285497426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10562063 (or 10562060 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 25285497426 in words is "twenty-five billion, two hundred eighty-five million, four hundred ninety-seven thousand, four hundred twenty-six".