25205407873 has 4 divisors (see below), whose sum is σ = 25232024880. Its totient is φ = 25178790868.

The previous prime is 25205407841. The next prime is 25205407889. The reversal of 25205407873 is 37870450252.

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 25205407873 - 2⁵ = 25205407841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25205407373) 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, 13307083 + ... + 13308976.

It is an arithmetic number, because the mean of its divisors is an integer number (6308006220).

Almost surely, 2^25205407873 is an apocalyptic number.

It is an amenable number.

25205407873 is a deficient number, since it is larger than the sum of its proper divisors (26617007).

25205407873 is an equidigital number, since it uses as much as digits as its factorization.

25205407873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26617006.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 25205407873 in words is "twenty-five billion, two hundred five million, four hundred seven thousand, eight hundred seventy-three".