42878516315812 has 12 divisors (see below), whose sum is σ = 79451368467660. Its totient is φ = 20178125325056.

The previous prime is 42878516315783. The next prime is 42878516315827. The reversal of 42878516315812 is 21851361587824.

It can be written as a sum of positive squares in 2 ways, for example, as 13908006670336 + 28970509645476 = 3729344^2 + 5382426^2 .

It is a super-2 number, since 2×42878516315812² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315283208137 + ... + 315283208272.

It is an arithmetic number, because the mean of its divisors is an integer number (6620947372305).

Almost surely, 2^{42878516315812} is an apocalyptic number.

It is an amenable number.

42878516315812 is a deficient number, since it is larger than the sum of its proper divisors (36572852151848).

42878516315812 is a wasteful number, since it uses less digits than its factorization.

42878516315812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630566416430 (or 630566416428 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 61.

The spelling of 42878516315812 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred sixteen million, three hundred fifteen thousand, eight hundred twelve".