7678980811 has 4 divisors (see below), whose sum is σ = 7679698312. Its totient is φ = 7678263312.

The previous prime is 7678980809. The next prime is 7678980817. The reversal of 7678980811 is 1180898767.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7678980811 - 2¹ = 7678980809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7678980817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342450 + ... + 364183.

It is an arithmetic number, because the mean of its divisors is an integer number (1919924578).

Almost surely, 2^7678980811 is an apocalyptic number.

7678980811 is a deficient number, since it is larger than the sum of its proper divisors (717501).

7678980811 is a wasteful number, since it uses less digits than its factorization.

7678980811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717500.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The square root of 7678980811 is about 87629.7940828346. The cubic root of 7678980811 is about 1972.8823800403.

The spelling of 7678980811 in words is "seven billion, six hundred seventy-eight million, nine hundred eighty thousand, eight hundred eleven".