2168728198001 has 2 divisors, whose sum is σ = 2168728198002. Its totient is φ = 2168728198000.

The previous prime is 2168728197989. The next prime is 2168728198103. The reversal of 2168728198001 is 1008918278612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1733372363776 + 435355834225 = 1316576^2 + 659815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168728198001 - 2²² = 2168724003697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168728198501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084364099000 + 1084364099001.

It is an arithmetic number, because the mean of its divisors is an integer number (1084364099001).

Almost surely, 2^{2168728198001} is an apocalyptic number.

It is an amenable number.

2168728198001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168728198001 is an equidigital number, since it uses as much as digits as its factorization.

2168728198001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 53.

The spelling of 2168728198001 in words is "two trillion, one hundred sixty-eight billion, seven hundred twenty-eight million, one hundred ninety-eight thousand, one".