25436022540 has 48 divisors (see below), whose sum is σ = 75410328672. Its totient is φ = 6383942656.

The previous prime is 25436022539. The next prime is 25436022571. The reversal of 25436022540 is 4522063452.

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, 12467619 + ... + 12469658.

It is an arithmetic number, because the mean of its divisors is an integer number (1571048514).

Almost surely, 2^25436022540 is an apocalyptic number.

25436022540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25436022540 is an abundant number, since it is smaller than the sum of its proper divisors (49974306132).

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

25436022540 is a wasteful number, since it uses less digits than its factorization.

25436022540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24937306 (or 24937304 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 25436022540 its reverse (4522063452), we get a palindrome (29958085992).

The spelling of 25436022540 in words is "twenty-five billion, four hundred thirty-six million, twenty-two thousand, five hundred forty".