25440201400 has 48 divisors (see below), whose sum is σ = 60264502200. Its totient is φ = 9984074880.

The previous prime is 25440201383. The next prime is 25440201401. The reversal of 25440201400 is 410204452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440201401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189410 + ... + 1210609.

Almost surely, 2^25440201400 is an apocalyptic number.

25440201400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25440201400 is an abundant number, since it is smaller than the sum of its proper divisors (34824300800).

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

25440201400 is a wasteful number, since it uses less digits than its factorization.

25440201400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400088 (or 2400079 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 25440201400 its reverse (410204452), we get a palindrome (25850405852).

The spelling of 25440201400 in words is "twenty-five billion, four hundred forty million, two hundred one thousand, four hundred".