42664580181 has 24 divisors (see below), whose sum is σ = 64632522240. Its totient is φ = 27068269536.

The previous prime is 42664580171. The next prime is 42664580191. The reversal of 42664580181 is 18108546624.

It is a happy number.

42664580181 is a `hidden beast` number, since 4 + 2 + 6 + 64 + 580 + 1 + 8 + 1 = 666.

42664580181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42664580171) and next prime (42664580191).

It is not a de Polignac number, because 42664580181 - 2⁶ = 42664580117 is a prime.

It is a super-2 number, since 2×42664580181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42664580171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 482341 + ... + 563898.

It is an arithmetic number, because the mean of its divisors is an integer number (2693021760).

Almost surely, 2^42664580181 is an apocalyptic number.

It is an amenable number.

42664580181 is a deficient number, since it is larger than the sum of its proper divisors (21967942059).

42664580181 is a wasteful number, since it uses less digits than its factorization.

42664580181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046465 (or 1046462 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 42664580181 in words is "forty-two billion, six hundred sixty-four million, five hundred eighty thousand, one hundred eighty-one".