25997047696 has 45 divisors (see below), whose sum is σ = 50880481939. Its totient is φ = 12867922688.

The previous prime is 25997047669. The next prime is 25997047721. The reversal of 25997047696 is 69674079952.

The square root of 25997047696 is 161236.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 677873296 + 25319174400 = 26036^2 + 159120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 111575196 + ... + 111575428.

Almost surely, 2^25997047696 is an apocalyptic number.

25997047696 is the 161236-th square number.

It is an amenable number.

25997047696 is a deficient number, since it is larger than the sum of its proper divisors (24883434243).

25997047696 is an frugal number, since it uses more digits than its factorization.

25997047696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 64.

Multiplying 25997047696 by its sum of digits (64), we get a square (1663811052544 = 1289888²).

The spelling of 25997047696 in words is "twenty-five billion, nine hundred ninety-seven million, forty-seven thousand, six hundred ninety-six".