7776199989 has 16 divisors (see below), whose sum is σ = 11662525440. Its totient is φ = 5184131868.

The previous prime is 7776199943. The next prime is 7776199997. The reversal of 7776199989 is 9899916777.

It is not a de Polignac number, because 7776199989 - 2⁷ = 7776199861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7776199919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1775637 + ... + 1780010.

It is an arithmetic number, because the mean of its divisors is an integer number (728907840).

Almost surely, 2^7776199989 is an apocalyptic number.

It is an amenable number.

7776199989 is a deficient number, since it is larger than the sum of its proper divisors (3886325451).

7776199989 is an frugal number, since it uses more digits than its factorization.

7776199989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555668 (or 3555650 counting only the distinct ones).

The product of its digits is 108020304, while the sum is 72.

The square root of 7776199989 is about 88182.7646935613. The cubic root of 7776199989 is about 1981.1733334795.

The spelling of 7776199989 in words is "seven billion, seven hundred seventy-six million, one hundred ninety-nine thousand, nine hundred eighty-nine".