63216660621 has 16 divisors (see below), whose sum is σ = 87202200960. Its totient is φ = 40688007360.

The previous prime is 63216660613. The next prime is 63216660641. The reversal of 63216660621 is 12606661236.

It is not a de Polignac number, because 63216660621 - 2³ = 63216660613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63216660621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63216660641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681651 + ... + 1718831.

It is an arithmetic number, because the mean of its divisors is an integer number (5450137560).

Almost surely, 2^63216660621 is an apocalyptic number.

It is an amenable number.

63216660621 is a deficient number, since it is larger than the sum of its proper divisors (23985540339).

63216660621 is a wasteful number, since it uses less digits than its factorization.

63216660621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56756.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 63216660621 in words is "sixty-three billion, two hundred sixteen million, six hundred sixty thousand, six hundred twenty-one".