25656654323 has 4 divisors (see below), whose sum is σ = 25659705888. Its totient is φ = 25653602760.

The previous prime is 25656654319. The next prime is 25656654329. The reversal of 25656654323 is 32345665652.

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 25656654323 - 2² = 25656654319 is a prime.

It is a super-2 number, since 2×25656654323² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25656654329) 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, 1513136 + ... + 1529997.

It is an arithmetic number, because the mean of its divisors is an integer number (6414926472).

Almost surely, 2^25656654323 is an apocalyptic number.

25656654323 is a deficient number, since it is larger than the sum of its proper divisors (3051565).

25656654323 is an equidigital number, since it uses as much as digits as its factorization.

25656654323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051564.

The product of its digits is 3888000, while the sum is 47.

The spelling of 25656654323 in words is "twenty-five billion, six hundred fifty-six million, six hundred fifty-four thousand, three hundred twenty-three".