25601404198 has 16 divisors (see below), whose sum is σ = 38508687360. Its totient is φ = 12765210696.

The previous prime is 25601404181. The next prime is 25601404207. The reversal of 25601404198 is 89140410652.

It is a self number, because there is not a number n which added to its sum of digits gives 25601404198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1635115 + ... + 1650697.

It is an arithmetic number, because the mean of its divisors is an integer number (2406792960).

Almost surely, 2^25601404198 is an apocalyptic number.

25601404198 is a deficient number, since it is larger than the sum of its proper divisors (12907283162).

25601404198 is a wasteful number, since it uses less digits than its factorization.

25601404198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17811.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 25601404198 in words is "twenty-five billion, six hundred one million, four hundred four thousand, one hundred ninety-eight".