25496864897 has 4 divisors (see below), whose sum is σ = 29139274176. Its totient is φ = 21854455620.

The previous prime is 25496864881. The next prime is 25496864923. The reversal of 25496864897 is 79846869452.

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 25496864897 - 2⁴ = 25496864881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25496864857) 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, 1821204629 + ... + 1821204642.

It is an arithmetic number, because the mean of its divisors is an integer number (7284818544).

Almost surely, 2^25496864897 is an apocalyptic number.

It is an amenable number.

25496864897 is a deficient number, since it is larger than the sum of its proper divisors (3642409279).

25496864897 is an equidigital number, since it uses as much as digits as its factorization.

25496864897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642409278.

The product of its digits is 209018880, while the sum is 68.

The spelling of 25496864897 in words is "twenty-five billion, four hundred ninety-six million, eight hundred sixty-four thousand, eight hundred ninety-seven".