25800434641 has 4 divisors (see below), whose sum is σ = 25815622000. Its totient is φ = 25785247284.

The previous prime is 25800434633. The next prime is 25800434651. The reversal of 25800434641 is 14643400852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25800434641 - 2³ = 25800434633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25800434641.

It is not an unprimeable number, because it can be changed into a prime (25800434651) 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, 7591131 + ... + 7594528.

It is an arithmetic number, because the mean of its divisors is an integer number (6453905500).

Almost surely, 2^25800434641 is an apocalyptic number.

It is an amenable number.

25800434641 is a deficient number, since it is larger than the sum of its proper divisors (15187359).

25800434641 is a wasteful number, since it uses less digits than its factorization.

25800434641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15187358.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 25800434641 in words is "twenty-five billion, eight hundred million, four hundred thirty-four thousand, six hundred forty-one".