42878766478836 has 48 divisors (see below), whose sum is σ = 110541679323264. Its totient is φ = 12867285421056.

The previous prime is 42878766478831. The next prime is 42878766478901. The reversal of 42878766478836 is 63887466787824.

It is a happy number.

It is a super-2 number, since 2×42878766478836² (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 (42878766478831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4569343825 + ... + 4569353208.

It is an arithmetic number, because the mean of its divisors is an integer number (2302951652568).

Almost surely, 2^{42878766478836} is an apocalyptic number.

42878766478836 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42878766478836 is an abundant number, since it is smaller than the sum of its proper divisors (67662912844428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42878766478836 is a wasteful number, since it uses less digits than its factorization.

42878766478836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138697080 (or 9138697078 counting only the distinct ones).

The product of its digits is 29132587008, while the sum is 84.

The spelling of 42878766478836 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred sixty-six million, four hundred seventy-eight thousand, eight hundred thirty-six".