25598856001 has 4 divisors (see below), whose sum is σ = 26290717012. Its totient is φ = 24906994992.

The previous prime is 25598855993. The next prime is 25598856007. The reversal of 25598856001 is 10065889552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16155681025 + 9443174976 = 127105^2 + 97176^2 .

It is a cyclic number.

It is not a de Polignac number, because 25598856001 - 2³ = 25598855993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25598856007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345930450 + ... + 345930523.

It is an arithmetic number, because the mean of its divisors is an integer number (6572679253).

Almost surely, 2^25598856001 is an apocalyptic number.

It is an amenable number.

25598856001 is a deficient number, since it is larger than the sum of its proper divisors (691861011).

25598856001 is an equidigital number, since it uses as much as digits as its factorization.

25598856001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691861010.

The product of its (nonzero) digits is 864000, while the sum is 49.

The spelling of 25598856001 in words is "twenty-five billion, five hundred ninety-eight million, eight hundred fifty-six thousand, one".