25728214623 has 4 divisors (see below), whose sum is σ = 34304286168. Its totient is φ = 17152143080.

The previous prime is 25728214571. The next prime is 25728214627. The reversal of 25728214623 is 32641282752.

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 25728214623 - 2⁶ = 25728214559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728214627) 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, 4288035768 + ... + 4288035773.

It is an arithmetic number, because the mean of its divisors is an integer number (8576071542).

Almost surely, 2^25728214623 is an apocalyptic number.

25728214623 is a deficient number, since it is larger than the sum of its proper divisors (8576071545).

25728214623 is an equidigital number, since it uses as much as digits as its factorization.

25728214623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8576071544.

The product of its digits is 322560, while the sum is 42.

The spelling of 25728214623 in words is "twenty-five billion, seven hundred twenty-eight million, two hundred fourteen thousand, six hundred twenty-three".