2116818364536 has 80 divisors (see below), whose sum is σ = 5929805550240. Its totient is φ = 705516376320.

The previous prime is 2116818364499. The next prime is 2116818364567. The reversal of 2116818364536 is 6354638186112.

It is a happy number.

2116818364536 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 8 + 183 + 6 + 453 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4991281 + ... + 5398751.

It is an arithmetic number, because the mean of its divisors is an integer number (74122569378).

Almost surely, 2^{2116818364536} is an apocalyptic number.

It is an amenable number.

2116818364536 is an abundant number, since it is smaller than the sum of its proper divisors (3812987185704).

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

2116818364536 is a wasteful number, since it uses less digits than its factorization.

2116818364536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415506 (or 415493 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 2116818364536 in words is "two trillion, one hundred sixteen billion, eight hundred eighteen million, three hundred sixty-four thousand, five hundred thirty-six".