25706644623 has 112 divisors (see below), whose sum is σ = 45072032256. Its totient is φ = 14495785920.

The previous prime is 25706644589. The next prime is 25706644637. The reversal of 25706644623 is 32644660752.

It is not a de Polignac number, because 25706644623 - 2¹⁷ = 25706513551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25706644723) 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 111 ways as a sum of consecutive naturals, for example, 6822286 + ... + 6826052.

Almost surely, 2^25706644623 is an apocalyptic number.

25706644623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25706644623 is a deficient number, since it is larger than the sum of its proper divisors (19365387633).

25706644623 is a wasteful number, since it uses less digits than its factorization.

25706644623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3841 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 25706644623 in words is "twenty-five billion, seven hundred six million, six hundred forty-four thousand, six hundred twenty-three".