26782636680 has 48 divisors (see below), whose sum is σ = 87043570380. Its totient is φ = 7142036352.

The previous prime is 26782636631. The next prime is 26782636703. The reversal of 26782636680 is 8663628762.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26745985764 + 36650916 = 163542^2 + 6054^2 .

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 11 ways as a sum of consecutive naturals, for example, 37197747 + ... + 37198466.

Almost surely, 2^26782636680 is an apocalyptic number.

26782636680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26782636680 is an abundant number, since it is smaller than the sum of its proper divisors (60260933700).

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

26782636680 is a wasteful number, since it uses less digits than its factorization.

26782636680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74396230 (or 74396223 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 26782636680 in words is "twenty-six billion, seven hundred eighty-two million, six hundred thirty-six thousand, six hundred eighty".