25381885340 has 72 divisors (see below), whose sum is σ = 62161454880. Its totient is φ = 8680307328.

The previous prime is 25381885339. The next prime is 25381885351. The reversal of 25381885340 is 4358818352.

It is a congruent 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, 356441 + ... + 421679.

It is an arithmetic number, because the mean of its divisors is an integer number (863353540).

Almost surely, 2^25381885340 is an apocalyptic number.

25381885340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25381885340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31080727440).

25381885340 is an abundant number, since it is smaller than the sum of its proper divisors (36779569540).

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

25381885340 is a wasteful number, since it uses less digits than its factorization.

25381885340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65659 (or 65650 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 25381885340 in words is "twenty-five billion, three hundred eighty-one million, eight hundred eighty-five thousand, three hundred forty".