42061040685089 has 2 divisors, whose sum is σ = 42061040685090. Its totient is φ = 42061040685088.

The previous prime is 42061040685071. The next prime is 42061040685199. The reversal of 42061040685089 is 98058604016024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40678781952064 + 1382258733025 = 6377992^2 + 1175695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42061040685089 is a prime.

It is a super-2 number, since 2×42061040685089² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42061040685089.

It is not a weakly prime, because it can be changed into another prime (42061042685089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21030520342544 + 21030520342545.

It is an arithmetic number, because the mean of its divisors is an integer number (21030520342545).

Almost surely, 2^{42061040685089} is an apocalyptic number.

It is an amenable number.

42061040685089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42061040685089 is an equidigital number, since it uses as much as digits as its factorization.

42061040685089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 42061040685089 in words is "forty-two trillion, sixty-one billion, forty million, six hundred eighty-five thousand, eighty-nine".