21160776606 has 8 divisors (see below), whose sum is σ = 42321553224. Its totient is φ = 7053592200.

The previous prime is 21160776601. The next prime is 21160776613. The reversal of 21160776606 is 60667706112.

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

21160776606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160776601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1763398045 + ... + 1763398056.

It is an arithmetic number, because the mean of its divisors is an integer number (5290194153).

Almost surely, 2^21160776606 is an apocalyptic number.

21160776606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21160776606 is a wasteful number, since it uses less digits than its factorization.

21160776606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526796106.

The product of its (nonzero) digits is 127008, while the sum is 42.

The spelling of 21160776606 in words is "twenty-one billion, one hundred sixty million, seven hundred seventy-six thousand, six hundred six".