25920000005 has 8 divisors (see below), whose sum is σ = 31105574424. Its totient is φ = 20734950400.

The previous prime is 25919999999. The next prime is 25920000019. The reversal of 25920000005 is 50000002952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2859147841 + 23060852164 = 53471^2 + 151858^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25920000005 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 12836 + ... + 228045.

It is an arithmetic number, because the mean of its divisors is an integer number (3888196803).

Almost surely, 2^25920000005 is an apocalyptic number.

It is an amenable number.

25920000005 is a deficient number, since it is larger than the sum of its proper divisors (5185574419).

25920000005 is a wasteful number, since it uses less digits than its factorization.

25920000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262407.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 25920000005 its reverse (50000002952), we get a palindrome (75920002957).

The spelling of 25920000005 in words is "twenty-five billion, nine hundred twenty million, five", and thus it is an aban number.