2115516331663 has 12 divisors (see below), whose sum is σ = 2460989040240. Its totient is φ = 1813239080352.

The previous prime is 2115516331657. The next prime is 2115516331679. The reversal of 2115516331663 is 3661336155112.

It is a happy number.

It is not a de Polignac number, because 2115516331663 - 2⁵ = 2115516331631 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 (2115516331603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 790558 + ... + 2203636.

It is an arithmetic number, because the mean of its divisors is an integer number (205082420020).

Almost surely, 2^{2115516331663} is an apocalyptic number.

2115516331663 is a deficient number, since it is larger than the sum of its proper divisors (345472708577).

2115516331663 is a wasteful number, since it uses less digits than its factorization.

2115516331663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443646 (or 1443639 counting only the distinct ones).

The product of its digits is 291600, while the sum is 43.

The spelling of 2115516331663 in words is "two trillion, one hundred fifteen billion, five hundred sixteen million, three hundred thirty-one thousand, six hundred sixty-three".