25591680676 has 9 divisors (see below), whose sum is σ = 44786001099. Its totient is φ = 12795680364.

The previous prime is 25591680629. The next prime is 25591680683. The reversal of 25591680676 is 67608619552.

The square root of 25591680676 is 159974.

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

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 2 ways as a sum of consecutive naturals, for example, 279955 + ... + 359941.

Almost surely, 2^25591680676 is an apocalyptic number.

25591680676 is the 159974-th square number.

It is an amenable number.

25591680676 is a deficient number, since it is larger than the sum of its proper divisors (19194320423).

25591680676 is an frugal number, since it uses more digits than its factorization.

25591680676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159978 (or 79989 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 25591680676 in words is "twenty-five billion, five hundred ninety-one million, six hundred eighty thousand, six hundred seventy-six".