1942973143561 has 2 divisors, whose sum is σ = 1942973143562. Its totient is φ = 1942973143560.

The previous prime is 1942973143537. The next prime is 1942973143597. The reversal of 1942973143561 is 1653413792491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357050255625 + 585922887936 = 1164925^2 + 765456^2 .

It is an emirp because it is prime and its reverse (1653413792491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1942973143561 - 2¹⁷ = 1942973012489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1942973143061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971486571780 + 971486571781.

It is an arithmetic number, because the mean of its divisors is an integer number (971486571781).

Almost surely, 2^{1942973143561} is an apocalyptic number.

It is an amenable number.

1942973143561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942973143561 is an equidigital number, since it uses as much as digits as its factorization.

1942973143561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 55.

The spelling of 1942973143561 in words is "one trillion, nine hundred forty-two billion, nine hundred seventy-three million, one hundred forty-three thousand, five hundred sixty-one".