25005340400 has 60 divisors (see below), whose sum is σ = 60265147992. Its totient is φ = 9970533120.

The previous prime is 25005340397. The next prime is 25005340433. The reversal of 25005340400 is 404350052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28199 + ... + 225401.

Almost surely, 2^25005340400 is an apocalyptic number.

25005340400 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 25005340400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30132573996).

25005340400 is an abundant number, since it is smaller than the sum of its proper divisors (35259807592).

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

25005340400 is a wasteful number, since it uses less digits than its factorization.

25005340400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197538 (or 197527 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

Adding to 25005340400 its reverse (404350052), we get a palindrome (25409690452).

The spelling of 25005340400 in words is "twenty-five billion, five million, three hundred forty thousand, four hundred".