1642221513277 has 2 divisors, whose sum is σ = 1642221513278. Its totient is φ = 1642221513276.

The previous prime is 1642221513227. The next prime is 1642221513293. The reversal of 1642221513277 is 7723151222461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032430759396 + 609790753881 = 1016086^2 + 780891^2 .

It is an emirp because it is prime and its reverse (7723151222461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642221513277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642221513227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821110756638 + 821110756639.

It is an arithmetic number, because the mean of its divisors is an integer number (821110756639).

Almost surely, 2^{1642221513277} is an apocalyptic number.

It is an amenable number.

1642221513277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642221513277 is an equidigital number, since it uses as much as digits as its factorization.

1642221513277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The spelling of 1642221513277 in words is "one trillion, six hundred forty-two billion, two hundred twenty-one million, five hundred thirteen thousand, two hundred seventy-seven".