2168728198002 has 24 divisors (see below), whose sum is σ = 4698938381436. Its totient is φ = 722905201536.

The previous prime is 2168728198001. The next prime is 2168728198103. The reversal of 2168728198002 is 2008918278612.

It can be written as a sum of positive squares in 2 ways, for example, as 2020864108041 + 147864089961 = 1421571^2 + 384531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2168728198002.

It is not an unprimeable number, because it can be changed into a prime (2168728198001) 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, 5318158 + ... + 5711414.

Almost surely, 2^{2168728198002} is an apocalyptic number.

2168728198002 is an abundant number, since it is smaller than the sum of its proper divisors (2530210183434).

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

2168728198002 is a wasteful number, since it uses less digits than its factorization.

2168728198002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699642 (or 699639 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 2168728198002 in words is "two trillion, one hundred sixty-eight billion, seven hundred twenty-eight million, one hundred ninety-eight thousand, two".