42778559808 has 280 divisors, whose sum is σ = 131834107680. Its totient is φ = 13756055040.

The previous prime is 42778559783. The next prime is 42778559819. The reversal of 42778559808 is 80895587724.

42778559808 is a `hidden beast` number, since 4 + 2 + 7 + 78 + 559 + 8 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36531063 + ... + 36532233.

Almost surely, 2^42778559808 is an apocalyptic number.

42778559808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42778559808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65917053840).

42778559808 is an abundant number, since it is smaller than the sum of its proper divisors (89055547872).

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

42778559808 is an frugal number, since it uses more digits than its factorization.

42778559808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 63.

The spelling of 42778559808 in words is "forty-two billion, seven hundred seventy-eight million, five hundred fifty-nine thousand, eight hundred eight".