3216615861797 has 16 divisors (see below), whose sum is σ = 3499494297600. Its totient is φ = 2938955830272.

The previous prime is 3216615861761. The next prime is 3216615861839. The reversal of 3216615861797 is 7971685166123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3216615861797 - 2²⁴ = 3216599084581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216615861737) 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, 2721893 + ... + 3720474.

It is an arithmetic number, because the mean of its divisors is an integer number (218718393600).

Almost surely, 2^{3216615861797} is an apocalyptic number.

It is an amenable number.

3216615861797 is a deficient number, since it is larger than the sum of its proper divisors (282878435803).

3216615861797 is a wasteful number, since it uses less digits than its factorization.

3216615861797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442772.

The product of its digits is 22861440, while the sum is 62.

The spelling of 3216615861797 in words is "three trillion, two hundred sixteen billion, six hundred fifteen million, eight hundred sixty-one thousand, seven hundred ninety-seven".