25280028005 has 4 divisors (see below), whose sum is σ = 30336033612. Its totient is φ = 20224022400.

The previous prime is 25280027999. The next prime is 25280028013. The reversal of 25280028005 is 50082008252.

It is a happy number.

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 14797749316 + 10482278689 = 121646^2 + 102383^2 .

It is not a de Polignac number, because 25280028005 - 2²² = 25275833701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2528002796 + ... + 2528002805.

It is an arithmetic number, because the mean of its divisors is an integer number (7584008403).

Almost surely, 2^25280028005 is an apocalyptic number.

It is an amenable number.

25280028005 is a deficient number, since it is larger than the sum of its proper divisors (5056005607).

25280028005 is an equidigital number, since it uses as much as digits as its factorization.

25280028005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056005606.

The product of its (nonzero) digits is 12800, while the sum is 32.

The spelling of 25280028005 in words is "twenty-five billion, two hundred eighty million, twenty-eight thousand, five".