25397459473 has 4 divisors (see below), whose sum is σ = 25424279280. Its totient is φ = 25370639668.

The previous prime is 25397459449. The next prime is 25397459489. The reversal of 25397459473 is 37495479352.

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-25397459473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25397459443) 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, 13408483 + ... + 13410376.

It is an arithmetic number, because the mean of its divisors is an integer number (6356069820).

Almost surely, 2^25397459473 is an apocalyptic number.

It is an amenable number.

25397459473 is a deficient number, since it is larger than the sum of its proper divisors (26819807).

25397459473 is an equidigital number, since it uses as much as digits as its factorization.

25397459473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26819806.

The product of its digits is 28576800, while the sum is 58.

The spelling of 25397459473 in words is "twenty-five billion, three hundred ninety-seven million, four hundred fifty-nine thousand, four hundred seventy-three".