25555025051 has 4 divisors (see below), whose sum is σ = 25555540704. Its totient is φ = 25554509400.

The previous prime is 25555025033. The next prime is 25555025063. The reversal of 25555025051 is 15052055552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555025051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25555025021) 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, 174515 + ... + 285596.

It is an arithmetic number, because the mean of its divisors is an integer number (6388885176).

Almost surely, 2^25555025051 is an apocalyptic number.

25555025051 is a deficient number, since it is larger than the sum of its proper divisors (515653).

25555025051 is an equidigital number, since it uses as much as digits as its factorization.

25555025051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515652.

The product of its (nonzero) digits is 62500, while the sum is 35.

The spelling of 25555025051 in words is "twenty-five billion, five hundred fifty-five million, twenty-five thousand, fifty-one".