42780138980 has 12 divisors (see below), whose sum is σ = 89838291900. Its totient is φ = 17112055584.

The previous prime is 42780138977. The next prime is 42780139007. The reversal of 42780138980 is 8983108724.

It can be written as a sum of positive squares in 2 ways, for example, as 20576754916 + 22203384064 = 143446^2 + 149008^2 .

It is a super-2 number, since 2×42780138980² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069503455 + ... + 1069503494.

It is an arithmetic number, because the mean of its divisors is an integer number (7486524325).

Almost surely, 2^42780138980 is an apocalyptic number.

It is an amenable number.

42780138980 is an abundant number, since it is smaller than the sum of its proper divisors (47058152920).

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

42780138980 is a wasteful number, since it uses less digits than its factorization.

42780138980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139006958 (or 2139006956 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 42780138980 in words is "forty-two billion, seven hundred eighty million, one hundred thirty-eight thousand, nine hundred eighty".