21776076717 has 8 divisors (see below), whose sum is σ = 29263389696. Its totient is φ = 14403074112.

The previous prime is 21776076677. The next prime is 21776076767. The reversal of 21776076717 is 71767067712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21776076717 - 2⁶ = 21776076653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21776076717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21776076767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28577148 + ... + 28577909.

It is an arithmetic number, because the mean of its divisors is an integer number (3657923712).

Almost surely, 2^21776076717 is an apocalyptic number.

It is an amenable number.

21776076717 is a deficient number, since it is larger than the sum of its proper divisors (7487312979).

21776076717 is a wasteful number, since it uses less digits than its factorization.

21776076717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57155187.

The product of its (nonzero) digits is 1210104, while the sum is 51.

The spelling of 21776076717 in words is "twenty-one billion, seven hundred seventy-six million, seventy-six thousand, seven hundred seventeen".