842915518993 has 2 divisors, whose sum is σ = 842915518994. Its totient is φ = 842915518992.

The previous prime is 842915518987. The next prime is 842915519003. The reversal of 842915518993 is 399815519248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751044090384 + 91871428609 = 866628^2 + 303103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842915518993 is a prime.

It is not a weakly prime, because it can be changed into another prime (842915518903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421457759496 + 421457759497.

It is an arithmetic number, because the mean of its divisors is an integer number (421457759497).

Almost surely, 2^842915518993 is an apocalyptic number.

It is an amenable number.

842915518993 is a deficient number, since it is larger than the sum of its proper divisors (1).

842915518993 is an equidigital number, since it uses as much as digits as its factorization.

842915518993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 64.

The spelling of 842915518993 in words is "eight hundred forty-two billion, nine hundred fifteen million, five hundred eighteen thousand, nine hundred ninety-three".