25681664373264 has 45 divisors (see below), whose sum is σ = 71873161457773. Its totient is φ = 8560534520256.

The previous prime is 25681664373241. The next prime is 25681664373331. The reversal of 25681664373264 is 46237346618652.

The square root of 25681664373264 is 5067708.

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

25681664373264 is a `hidden beast` number, since 2 + 5 + 6 + 8 + 166 + 437 + 32 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18552764373264 + 7128900000000 = 4307292^2 + 2670000^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 60601342 + ... + 61023650.

Almost surely, 2^{25681664373264} is an apocalyptic number.

25681664373264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

25681664373264 is the 5067708-th square number.

It is an amenable number.

25681664373264 is an abundant number, since it is smaller than the sum of its proper divisors (46191497084509).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25681664373264 is an frugal number, since it uses more digits than its factorization.

25681664373264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844632 (or 422314 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 63.

The spelling of 25681664373264 in words is "twenty-five trillion, six hundred eighty-one billion, six hundred sixty-four million, three hundred seventy-three thousand, two hundred sixty-four".