42878116915 has 4 divisors (see below), whose sum is σ = 51453740304. Its totient is φ = 34302493528.

The previous prime is 42878116913. The next prime is 42878116927. The reversal of 42878116915 is 51961187824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42878116915 - 2¹ = 42878116913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42878116913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4287811687 + ... + 4287811696.

It is an arithmetic number, because the mean of its divisors is an integer number (12863435076).

Almost surely, 2^42878116915 is an apocalyptic number.

42878116915 is a deficient number, since it is larger than the sum of its proper divisors (8575623389).

42878116915 is an equidigital number, since it uses as much as digits as its factorization.

42878116915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8575623388.

The product of its digits is 967680, while the sum is 52.

The spelling of 42878116915 in words is "forty-two billion, eight hundred seventy-eight million, one hundred sixteen thousand, nine hundred fifteen".