216264620444621 has 32 divisors (see below), whose sum is σ = 249662167252992. Its totient is φ = 183499318356480.

The previous prime is 216264620444597. The next prime is 216264620444647. The reversal of 216264620444621 is 126444026462612.

It is a happy number.

It is not a de Polignac number, because 216264620444621 - 2¹⁴ = 216264620428237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216264620444621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216264620044621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6842285600 + ... + 6842317206.

It is an arithmetic number, because the mean of its divisors is an integer number (7801942726656).

Almost surely, 2^{216264620444621} is an apocalyptic number.

It is an amenable number.

216264620444621 is a deficient number, since it is larger than the sum of its proper divisors (33397546808371).

216264620444621 is a wasteful number, since it uses less digits than its factorization.

216264620444621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48689.

The product of its (nonzero) digits is 5308416, while the sum is 50.

The spelling of 216264620444621 in words is "two hundred sixteen trillion, two hundred sixty-four billion, six hundred twenty million, four hundred forty-four thousand, six hundred twenty-one".