42846826581817 has 2 divisors, whose sum is σ = 42846826581818. Its totient is φ = 42846826581816.

The previous prime is 42846826581809. The next prime is 42846826581917. The reversal of 42846826581817 is 71818562864824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31111138885696 + 11735687696121 = 5577736^2 + 3425739^2 .

It is a cyclic number.

It is not a de Polignac number, because 42846826581817 - 2³ = 42846826581809 is a prime.

It is not a weakly prime, because it can be changed into another prime (42846826581917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423413290908 + 21423413290909.

It is an arithmetic number, because the mean of its divisors is an integer number (21423413290909).

Almost surely, 2^{42846826581817} is an apocalyptic number.

It is an amenable number.

42846826581817 is a deficient number, since it is larger than the sum of its proper divisors (1).

42846826581817 is an equidigital number, since it uses as much as digits as its factorization.

42846826581817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330301440, while the sum is 70.

The spelling of 42846826581817 in words is "forty-two trillion, eight hundred forty-six billion, eight hundred twenty-six million, five hundred eighty-one thousand, eight hundred seventeen".