25867610647 has 4 divisors (see below), whose sum is σ = 26253694456. Its totient is φ = 25481526840.

The previous prime is 25867610623. The next prime is 25867610677. The reversal of 25867610647 is 74601676852.

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 25867610647 - 2¹⁹ = 25867086359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25867610594 and 25867610603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25867610677) 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, 193041804 + ... + 193041937.

It is an arithmetic number, because the mean of its divisors is an integer number (6563423614).

Almost surely, 2^25867610647 is an apocalyptic number.

25867610647 is a deficient number, since it is larger than the sum of its proper divisors (386083809).

25867610647 is an equidigital number, since it uses as much as digits as its factorization.

25867610647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386083808.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 25867610647 in words is "twenty-five billion, eight hundred sixty-seven million, six hundred ten thousand, six hundred forty-seven".