2168728198047 has 6 divisors (see below), whose sum is σ = 3132607397192. Its totient is φ = 1445818798692.

The previous prime is 2168728198001. The next prime is 2168728198103. The reversal of 2168728198047 is 7408918278612.

It is not a de Polignac number, because 2168728198047 - 2⁸ = 2168728197791 is a prime.

It is a super-2 number, since 2×2168728198047² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168728198447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120484899883 + ... + 120484899900.

Almost surely, 2^{2168728198047} is an apocalyptic number.

2168728198047 is a deficient number, since it is larger than the sum of its proper divisors (963879199145).

2168728198047 is a wasteful number, since it uses less digits than its factorization.

2168728198047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240969799789 (or 240969799786 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 2168728198047 in words is "two trillion, one hundred sixty-eight billion, seven hundred twenty-eight million, one hundred ninety-eight thousand, forty-seven".