25190866243 has 4 divisors (see below), whose sum is σ = 25545667248. Its totient is φ = 24836065240.

The previous prime is 25190866231. The next prime is 25190866277. The reversal of 25190866243 is 34266809152.

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

It is a cyclic number.

It is not a de Polignac number, because 25190866243 - 2⁹ = 25190865731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25190866193 and 25190866202.

It is not an unprimeable number, because it can be changed into a prime (25190866223) 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, 177400396 + ... + 177400537.

It is an arithmetic number, because the mean of its divisors is an integer number (6386416812).

Almost surely, 2^25190866243 is an apocalyptic number.

25190866243 is a deficient number, since it is larger than the sum of its proper divisors (354801005).

25190866243 is an equidigital number, since it uses as much as digits as its factorization.

25190866243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354801004.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 25190866243 in words is "twenty-five billion, one hundred ninety million, eight hundred sixty-six thousand, two hundred forty-three".