25404401000 has 64 divisors (see below), whose sum is σ = 64850535360. Its totient is φ = 9237960000.

The previous prime is 25404400999. The next prime is 25404401059. The reversal of 25404401000 is 10440452.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143746 + ... + 1165745.

It is an arithmetic number, because the mean of its divisors is an integer number (1013289615).

Almost surely, 2^25404401000 is an apocalyptic number.

25404401000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25404401000 is an abundant number, since it is smaller than the sum of its proper divisors (39446134360).

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

25404401000 is a wasteful number, since it uses less digits than its factorization.

25404401000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309523 (or 2309509 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 25404401000 its reverse (10440452), we get a palindrome (25414841452).

The spelling of 25404401000 in words is "twenty-five billion, four hundred four million, four hundred one thousand".