26604219664 has 75 divisors (see below), whose sum is σ = 56868639285. Its totient is φ = 12056943360.

The previous prime is 26604219647. The next prime is 26604219671. The reversal of 26604219664 is 46691240662.

The square root of 26604219664 is 163108.

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

It can be written as a sum of positive squares in only one way, i.e., 7174090000 + 19430129664 = 84700^2 + 139392^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 78944104 + ... + 78944440.

Almost surely, 2^26604219664 is an apocalyptic number.

26604219664 is the 163108-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26604219664

26604219664 is an abundant number, since it is smaller than the sum of its proper divisors (30264419621).

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

26604219664 is an frugal number, since it uses more digits than its factorization.

26604219664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 26604219664 in words is "twenty-six billion, six hundred four million, two hundred nineteen thousand, six hundred sixty-four".