25605163047 has 4 divisors (see below), whose sum is σ = 34140217400. Its totient is φ = 17070108696.

The previous prime is 25605163043. The next prime is 25605163049. The reversal of 25605163047 is 74036150652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25605163047 - 2² = 25605163043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25605162996 and 25605163014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25605163043) 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, 4267527172 + ... + 4267527177.

It is an arithmetic number, because the mean of its divisors is an integer number (8535054350).

Almost surely, 2^25605163047 is an apocalyptic number.

25605163047 is a deficient number, since it is larger than the sum of its proper divisors (8535054353).

25605163047 is an equidigital number, since it uses as much as digits as its factorization.

25605163047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535054352.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 25605163047 in words is "twenty-five billion, six hundred five million, one hundred sixty-three thousand, forty-seven".