2078216680 has 32 divisors (see below), whose sum is σ = 4951047240. Its totient is φ = 782387200.

The previous prime is 2078216677. The next prime is 2078216711. The reversal of 2078216680 is 866128702.

It can be written as a sum of positive squares in 4 ways, for example, as 1264940356 + 813276324 = 35566^2 + 28518^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527421 + ... + 1528780.

Almost surely, 2^2078216680 is an apocalyptic number.

2078216680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2078216680 is an abundant number, since it is smaller than the sum of its proper divisors (2872830560).

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

2078216680 is a wasteful number, since it uses less digits than its factorization.

2078216680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056229 (or 3056225 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2078216680 is about 45587.4618727562. The cubic root of 2078216680 is about 1276.1359462472.

The spelling of 2078216680 in words is "two billion, seventy-eight million, two hundred sixteen thousand, six hundred eighty".