7980416978 has 4 divisors (see below), whose sum is σ = 11970625470. Its totient is φ = 3990208488.

The previous prime is 7980416959. The next prime is 7980417001. The reversal of 7980416978 is 8796140897.

7980416978 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5079840529 + 2900576449 = 71273^2 + 53857^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995104243 + ... + 1995104246.

Almost surely, 2^7980416978 is an apocalyptic number.

7980416978 is a deficient number, since it is larger than the sum of its proper divisors (3990208492).

7980416978 is a wasteful number, since it uses less digits than its factorization.

7980416978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990208491.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 7980416978 is about 89333.1796031016. The cubic root of 7980416978 is about 1998.3667481072.

The spelling of 7980416978 in words is "seven billion, nine hundred eighty million, four hundred sixteen thousand, nine hundred seventy-eight".