7780042816 has 84 divisors (see below), whose sum is σ = 19340667948. Its totient is φ = 3077803008.

The previous prime is 7780042801. The next prime is 7780042849. The reversal of 7780042816 is 6182400877.

It can be written as a sum of positive squares in 2 ways, for example, as 1095345216 + 6684697600 = 33096^2 + 81760^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54651 + ... + 136186.

It is an arithmetic number, because the mean of its divisors is an integer number (230246047).

Almost surely, 2^7780042816 is an apocalyptic number.

It is an amenable number.

7780042816 is an abundant number, since it is smaller than the sum of its proper divisors (11560625132).

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

7780042816 is a wasteful number, since it uses less digits than its factorization.

7780042816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190876 (or 190859 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 7780042816 is about 88204.5509936987. The cubic root of 7780042816 is about 1981.4996304978.

The spelling of 7780042816 in words is "seven billion, seven hundred eighty million, forty-two thousand, eight hundred sixteen".