42846815993 has 2 divisors, whose sum is σ = 42846815994. Its totient is φ = 42846815992.

The previous prime is 42846815953. The next prime is 42846816007. The reversal of 42846815993 is 39951864824.

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., 41931571984 + 915244009 = 204772^2 + 30253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42846815993 is a prime.

It is not a weakly prime, because it can be changed into another prime (42846815903) 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, 21423407996 + 21423407997.

It is an arithmetic number, because the mean of its divisors is an integer number (21423407997).

Almost surely, 2^42846815993 is an apocalyptic number.

It is an amenable number.

42846815993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42846815993 is an equidigital number, since it uses as much as digits as its factorization.

42846815993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 59.

The spelling of 42846815993 in words is "forty-two billion, eight hundred forty-six million, eight hundred fifteen thousand, nine hundred ninety-three".