42906594681 has 12 divisors (see below), whose sum is σ = 62290794852. Its totient is φ = 28459195296.

The previous prime is 42906594671. The next prime is 42906594733. The reversal of 42906594681 is 18649560924.

42906594681 is a `hidden beast` number, since 42 + 9 + 0 + 6 + 594 + 6 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25721744400 + 17184850281 = 160380^2 + 131091^2 .

It is not a de Polignac number, because 42906594681 - 2¹⁰ = 42906593657 is a prime.

It is a super-2 number, since 2×42906594681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42906594611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12098226 + ... + 12101771.

It is an arithmetic number, because the mean of its divisors is an integer number (5190899571).

Almost surely, 2^42906594681 is an apocalyptic number.

It is an amenable number.

42906594681 is a deficient number, since it is larger than the sum of its proper divisors (19384200171).

42906594681 is a wasteful number, since it uses less digits than its factorization.

42906594681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24200200 (or 24200197 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 42906594681 in words is "forty-two billion, nine hundred six million, five hundred ninety-four thousand, six hundred eighty-one".