25127267497 has 4 divisors (see below), whose sum is σ = 26449755280. Its totient is φ = 23804779716.

The previous prime is 25127267491. The next prime is 25127267563. The reversal of 25127267497 is 79476272152.

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 a de Polignac number, because none of the positive numbers 2^k-25127267497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25127267491) 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, 661243863 + ... + 661243900.

It is an arithmetic number, because the mean of its divisors is an integer number (6612438820).

Almost surely, 2^25127267497 is an apocalyptic number.

It is an amenable number.

25127267497 is a deficient number, since it is larger than the sum of its proper divisors (1322487783).

25127267497 is a wasteful number, since it uses less digits than its factorization.

25127267497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322487782.

The product of its digits is 2963520, while the sum is 52.

The spelling of 25127267497 in words is "twenty-five billion, one hundred twenty-seven million, two hundred sixty-seven thousand, four hundred ninety-seven".