25023206809 has 4 divisors (see below), whose sum is σ = 25042412416. Its totient is φ = 25004001204.

The previous prime is 25023206807. The next prime is 25023206821. The reversal of 25023206809 is 90860232052.

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 25023206809 - 2¹ = 25023206807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25023206807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9600849 + ... + 9603454.

It is an arithmetic number, because the mean of its divisors is an integer number (6260603104).

Almost surely, 2^25023206809 is an apocalyptic number.

It is an amenable number.

25023206809 is a deficient number, since it is larger than the sum of its proper divisors (19205607).

25023206809 is a wasteful number, since it uses less digits than its factorization.

25023206809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19205606.

The product of its (nonzero) digits is 51840, while the sum is 37.

It can be divided in two parts, 2502 and 3206809, that added together give a triangular number (3209311 = T₂₅₃₃).

The spelling of 25023206809 in words is "twenty-five billion, twenty-three million, two hundred six thousand, eight hundred nine".