25285172339 has 4 divisors (see below), whose sum is σ = 28897339824. Its totient is φ = 21673004856.

The previous prime is 25285172333. The next prime is 25285172359. The reversal of 25285172339 is 93327158252.

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

It is a cyclic number.

It is not a de Polignac number, because 25285172339 - 2⁸ = 25285172083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25285172293 and 25285172302.

It is not an unprimeable number, because it can be changed into a prime (25285172333) 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, 1806083732 + ... + 1806083745.

It is an arithmetic number, because the mean of its divisors is an integer number (7224334956).

Almost surely, 2^25285172339 is an apocalyptic number.

25285172339 is a deficient number, since it is larger than the sum of its proper divisors (3612167485).

25285172339 is an equidigital number, since it uses as much as digits as its factorization.

25285172339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612167484.

The product of its digits is 907200, while the sum is 47.

The spelling of 25285172339 in words is "twenty-five billion, two hundred eighty-five million, one hundred seventy-two thousand, three hundred thirty-nine".