25448838197 has 4 divisors (see below), whose sum is σ = 25695914400. Its totient is φ = 25201761996.

The previous prime is 25448838167. The next prime is 25448838301. The reversal of 25448838197 is 79183884452.

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 25448838197 - 2²⁰ = 25447789621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25448838137) 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, 123537947 + ... + 123538152.

It is an arithmetic number, because the mean of its divisors is an integer number (6423978600).

Almost surely, 2^25448838197 is an apocalyptic number.

It is an amenable number.

25448838197 is a deficient number, since it is larger than the sum of its proper divisors (247076203).

25448838197 is a wasteful number, since it uses less digits than its factorization.

25448838197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247076202.

The product of its digits is 15482880, while the sum is 59.

The spelling of 25448838197 in words is "twenty-five billion, four hundred forty-eight million, eight hundred thirty-eight thousand, one hundred ninety-seven".