42878456612181 has 24 divisors (see below), whose sum is σ = 62280851330880. Its totient is φ = 28426628160000.

The previous prime is 42878456612179. The next prime is 42878456612227. The reversal of 42878456612181 is 18121665487824.

42878456612181 is a `hidden beast` number, since 4 + 2 + 8 + 7 + 8 + 4 + 5 + 6 + 612 + 1 + 8 + 1 = 666.

It is not a de Polignac number, because 42878456612181 - 2¹ = 42878456612179 is a prime.

It is a super-2 number, since 2×42878456612181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878456612161) 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, 13615116 + ... + 16465973.

It is an arithmetic number, because the mean of its divisors is an integer number (2595035472120).

Almost surely, 2^{42878456612181} is an apocalyptic number.

It is an amenable number.

42878456612181 is a deficient number, since it is larger than the sum of its proper divisors (19402394718699).

42878456612181 is a wasteful number, since it uses less digits than its factorization.

42878456612181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30081977 (or 30081974 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 42878456612181 in words is "forty-two trillion, eight hundred seventy-eight billion, four hundred fifty-six million, six hundred twelve thousand, one hundred eighty-one".