561842153819 has 2 divisors, whose sum is σ = 561842153820. Its totient is φ = 561842153818.

The previous prime is 561842153797. The next prime is 561842153839. The reversal of 561842153819 is 918351248165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561842153819 is a prime.

It is a super-2 number, since 2×561842153819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (561842153839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280921076909 + 280921076910.

It is an arithmetic number, because the mean of its divisors is an integer number (280921076910).

Almost surely, 2^561842153819 is an apocalyptic number.

561842153819 is a deficient number, since it is larger than the sum of its proper divisors (1).

561842153819 is an equidigital number, since it uses as much as digits as its factorization.

561842153819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 53.

The spelling of 561842153819 in words is "five hundred sixty-one billion, eight hundred forty-two million, one hundred fifty-three thousand, eight hundred nineteen".