25601408404 has 48 divisors (see below), whose sum is σ = 54333006336. Its totient is φ = 10395331200.

The previous prime is 25601408309. The next prime is 25601408429. The reversal of 25601408404 is 40480410652.

It is a super-2 number, since 2×25601408404² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25601408404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704167 + ... + 739630.

It is an arithmetic number, because the mean of its divisors is an integer number (1131937632).

Almost surely, 2^25601408404 is an apocalyptic number.

It is an amenable number.

25601408404 is an abundant number, since it is smaller than the sum of its proper divisors (28731597932).

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

25601408404 is a wasteful number, since it uses less digits than its factorization.

25601408404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443856 (or 1443854 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The spelling of 25601408404 in words is "twenty-five billion, six hundred one million, four hundred eight thousand, four hundred four".