42850710515581 has 2 divisors, whose sum is σ = 42850710515582. Its totient is φ = 42850710515580.

The previous prime is 42850710515579. The next prime is 42850710515609. The reversal of 42850710515581 is 18551501705824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39574592415556 + 3276118100025 = 6290834^2 + 1810005^2 .

It is a cyclic number.

It is not a de Polignac number, because 42850710515581 - 2¹ = 42850710515579 is a prime.

It is a super-2 number, since 2×42850710515581² (a number of 28 digits) contains 22 as substring.

Together with 42850710515579, 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 (42850710510581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425355257790 + 21425355257791.

It is an arithmetic number, because the mean of its divisors is an integer number (21425355257791).

Almost surely, 2^{42850710515581} is an apocalyptic number.

It is an amenable number.

42850710515581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42850710515581 is an equidigital number, since it uses as much as digits as its factorization.

42850710515581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240000, while the sum is 52.

The spelling of 42850710515581 in words is "forty-two trillion, eight hundred fifty billion, seven hundred ten million, five hundred fifteen thousand, five hundred eighty-one".