25252555249 has 4 divisors (see below), whose sum is σ = 25680564720. Its totient is φ = 24824545780.

The previous prime is 25252555231. The next prime is 25252555291. The reversal of 25252555249 is 94255525252.

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 25252555249 - 2⁷ = 25252555121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25252555199 and 25252555208.

It is not an unprimeable number, because it can be changed into a prime (25252555219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214004647 + ... + 214004764.

It is an arithmetic number, because the mean of its divisors is an integer number (6420141180).

Almost surely, 2^25252555249 is an apocalyptic number.

It is an amenable number.

25252555249 is a deficient number, since it is larger than the sum of its proper divisors (428009471).

25252555249 is an equidigital number, since it uses as much as digits as its factorization.

25252555249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428009470.

The product of its digits is 1800000, while the sum is 46.

The spelling of 25252555249 in words is "twenty-five billion, two hundred fifty-two million, five hundred fifty-five thousand, two hundred forty-nine".