21611764766716 has 24 divisors (see below), whose sum is σ = 38042218889136. Its totient is φ = 10742712142080.

The previous prime is 21611764766689. The next prime is 21611764766759. The reversal of 21611764766716 is 61766746711612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18530251 + ... + 19661986.

It is an arithmetic number, because the mean of its divisors is an integer number (1585092453714).

Almost surely, 2^{21611764766716} is an apocalyptic number.

It is an amenable number.

21611764766716 is a deficient number, since it is larger than the sum of its proper divisors (16430454122420).

21611764766716 is a wasteful number, since it uses less digits than its factorization.

21611764766716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38193069 (or 38193067 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 61.

The spelling of 21611764766716 in words is "twenty-one trillion, six hundred eleven billion, seven hundred sixty-four million, seven hundred sixty-six thousand, seven hundred sixteen".