42685063381 has 4 divisors (see below), whose sum is σ = 42685540492. Its totient is φ = 42684586272.

The previous prime is 42685063349. The next prime is 42685063397. The reversal of 42685063381 is 18336058624.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25144444900 + 17540618481 = 158570^2 + 132441^2 .

It is a cyclic number.

It is not a de Polignac number, because 42685063381 - 2⁵ = 42685063349 is a prime.

It is a super-3 number, since 3×42685063381³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42685063321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59616 + ... + 298201.

It is an arithmetic number, because the mean of its divisors is an integer number (10671385123).

Almost surely, 2^42685063381 is an apocalyptic number.

It is an amenable number.

42685063381 is a deficient number, since it is larger than the sum of its proper divisors (477111).

42685063381 is a wasteful number, since it uses less digits than its factorization.

42685063381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477110.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 42685063381 in words is "forty-two billion, six hundred eighty-five million, sixty-three thousand, three hundred eighty-one".