42797434861 has 2 divisors, whose sum is σ = 42797434862. Its totient is φ = 42797434860.

The previous prime is 42797434859. The next prime is 42797434903. The reversal of 42797434861 is 16843479724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27824241636 + 14973193225 = 166806^2 + 122365^2 .

It is a cyclic number.

It is not a de Polignac number, because 42797434861 - 2¹ = 42797434859 is a prime.

Together with 42797434859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42797434961) 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, 21398717430 + 21398717431.

It is an arithmetic number, because the mean of its divisors is an integer number (21398717431).

Almost surely, 2^42797434861 is an apocalyptic number.

It is an amenable number.

42797434861 is a deficient number, since it is larger than the sum of its proper divisors (1).

42797434861 is an equidigital number, since it uses as much as digits as its factorization.

42797434861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 55.

The spelling of 42797434861 in words is "forty-two billion, seven hundred ninety-seven million, four hundred thirty-four thousand, eight hundred sixty-one".