25825387290 has 32 divisors (see below), whose sum is σ = 65243085120. Its totient is φ = 6524308224.

The previous prime is 25825387283. The next prime is 25825387351. The reversal of 25825387290 is 9278352852.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22653279 + ... + 22654418.

It is an arithmetic number, because the mean of its divisors is an integer number (2038846410).

Almost surely, 2^25825387290 is an apocalyptic number.

25825387290 is an abundant number, since it is smaller than the sum of its proper divisors (39417697830).

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

25825387290 is a wasteful number, since it uses less digits than its factorization.

25825387290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45307726.

The product of its (nonzero) digits is 2419200, while the sum is 51.

It can be divided in two parts, 258253 and 87290, that added together give a palindrome (345543).

The spelling of 25825387290 in words is "twenty-five billion, eight hundred twenty-five million, three hundred eighty-seven thousand, two hundred ninety".