25810851042 has 24 divisors (see below), whose sum is σ = 57994752816. Its totient is φ = 8603616852.

The previous prime is 25810851041. The next prime is 25810851067. The reversal of 25810851042 is 24015801852.

25810851042 is a `hidden beast` number, since 25 + 81 + 0 + 8 + 510 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25810850988 and 25810851006.

It is not an unprimeable number, because it can be changed into a prime (25810851041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26553888 + ... + 26554859.

It is an arithmetic number, because the mean of its divisors is an integer number (2416448034).

Almost surely, 2^25810851042 is an apocalyptic number.

25810851042 is an abundant number, since it is smaller than the sum of its proper divisors (32183901774).

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

25810851042 is an equidigital number, since it uses as much as digits as its factorization.

25810851042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53108764 (or 53108752 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The spelling of 25810851042 in words is "twenty-five billion, eight hundred ten million, eight hundred fifty-one thousand, forty-two".