25359976243 has 4 divisors (see below), whose sum is σ = 28982830000. Its totient is φ = 21737122488.

The previous prime is 25359976223. The next prime is 25359976259. The reversal of 25359976243 is 34267995352.

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-25359976243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25359976223) 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, 1811426868 + ... + 1811426881.

It is an arithmetic number, because the mean of its divisors is an integer number (7245707500).

Almost surely, 2^25359976243 is an apocalyptic number.

25359976243 is a deficient number, since it is larger than the sum of its proper divisors (3622853757).

25359976243 is an equidigital number, since it uses as much as digits as its factorization.

25359976243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622853756.

The product of its digits is 12247200, while the sum is 55.

The spelling of 25359976243 in words is "twenty-five billion, three hundred fifty-nine million, nine hundred seventy-six thousand, two hundred forty-three".