25550505005 has 4 divisors (see below), whose sum is σ = 30660606012. Its totient is φ = 20440404000.

The previous prime is 25550504963. The next prime is 25550505017. The reversal of 25550505005 is 50050505552.

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 13917156841 + 11633348164 = 117971^2 + 107858^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25550505005 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 3 ways as a sum of consecutive naturals, for example, 2555050496 + ... + 2555050505.

It is an arithmetic number, because the mean of its divisors is an integer number (7665151503).

Almost surely, 2^25550505005 is an apocalyptic number.

It is an amenable number.

25550505005 is a deficient number, since it is larger than the sum of its proper divisors (5110101007).

25550505005 is an equidigital number, since it uses as much as digits as its factorization.

25550505005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110101006.

The product of its (nonzero) digits is 31250, while the sum is 32.

The spelling of 25550505005 in words is "twenty-five billion, five hundred fifty million, five hundred five thousand, five".