6206161865921 has 2 divisors, whose sum is σ = 6206161865922. Its totient is φ = 6206161865920.

The previous prime is 6206161865837. The next prime is 6206161865963. The reversal of 6206161865921 is 1295681616026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4276785305521 + 1929376560400 = 2068039^2 + 1389020^2 .

It is a cyclic number.

It is not a de Polignac number, because 6206161865921 - 2¹⁸ = 6206161603777 is a prime.

It is not a weakly prime, because it can be changed into another prime (6206161865621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3103080932960 + 3103080932961.

It is an arithmetic number, because the mean of its divisors is an integer number (3103080932961).

Almost surely, 2^{6206161865921} is an apocalyptic number.

It is an amenable number.

6206161865921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6206161865921 is an equidigital number, since it uses as much as digits as its factorization.

6206161865921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 6206161865921 in words is "six trillion, two hundred six billion, one hundred sixty-one million, eight hundred sixty-five thousand, nine hundred twenty-one".