42236708861 has 2 divisors, whose sum is σ = 42236708862. Its totient is φ = 42236708860.

The previous prime is 42236708837. The next prime is 42236708909. The reversal of 42236708861 is 16880763224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37818580900 + 4418127961 = 194470^2 + 66469^2 .

It is a cyclic number.

It is not a de Polignac number, because 42236708861 - 2²² = 42232514557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42236708821) 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, 21118354430 + 21118354431.

It is an arithmetic number, because the mean of its divisors is an integer number (21118354431).

Almost surely, 2^42236708861 is an apocalyptic number.

It is an amenable number.

42236708861 is a deficient number, since it is larger than the sum of its proper divisors (1).

42236708861 is an equidigital number, since it uses as much as digits as its factorization.

42236708861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 42236708861 in words is "forty-two billion, two hundred thirty-six million, seven hundred eight thousand, eight hundred sixty-one".