42055317681 has 32 divisors (see below), whose sum is σ = 62498537472. Its totient is φ = 24979682880.

The previous prime is 42055317641. The next prime is 42055317719. The reversal of 42055317681 is 18671355024.

It is a happy number.

It is not a de Polignac number, because 42055317681 - 2¹⁴ = 42055301297 is a prime.

It is a super-2 number, since 2×42055317681² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42055317631) 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 31 ways as a sum of consecutive naturals, for example, 417636 + ... + 508458.

It is an arithmetic number, because the mean of its divisors is an integer number (1953079296).

Almost surely, 2^42055317681 is an apocalyptic number.

It is an amenable number.

42055317681 is a deficient number, since it is larger than the sum of its proper divisors (20443219791).

42055317681 is a wasteful number, since it uses less digits than its factorization.

42055317681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91253.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 42055317681 in words is "forty-two billion, fifty-five million, three hundred seventeen thousand, six hundred eighty-one".