42845274081 has 45 divisors (see below), whose sum is σ = 64903601763. Its totient is φ = 28167335280.

The previous prime is 42845274061. The next prime is 42845274083. The reversal of 42845274081 is 18047254824.

The square root of 42845274081 is 206991.

It is a perfect power (a square), and thus also a powerful number.

42845274081 is a `hidden beast` number, since 4 + 2 + 8 + 4 + 527 + 40 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29862950481 + 12982323600 = 172809^2 + 113940^2 .

It is not a de Polignac number, because 42845274081 - 2⁵ = 42845274049 is a prime.

It is a super-2 number, since 2×42845274081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42845274083) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 203058066 + ... + 203058276.

Almost surely, 2^42845274081 is an apocalyptic number.

42845274081 is the 206991-st square number.

42845274081 is the 103496-th centered octagonal number.

It is an amenable number.

42845274081 is a deficient number, since it is larger than the sum of its proper divisors (22058327682).

42845274081 is an frugal number, since it uses more digits than its factorization.

42845274081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The spelling of 42845274081 in words is "forty-two billion, eight hundred forty-five million, two hundred seventy-four thousand, eighty-one".