7819819816 has 32 divisors (see below), whose sum is σ = 15607296000. Its totient is φ = 3662499456.

The previous prime is 7819819807. The next prime is 7819819867. The reversal of 7819819816 is 6189189187.

It is a super-2 number, since 2×7819819816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275496 + ... + 302551.

It is an arithmetic number, because the mean of its divisors is an integer number (487728000).

Almost surely, 2^7819819816 is an apocalyptic number.

7819819816 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

7819819816 is a deficient number, since it is larger than the sum of its proper divisors (7787476184).

7819819816 is a wasteful number, since it uses less digits than its factorization.

7819819816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578161 (or 578157 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 58.

The square root of 7819819816 is about 88429.7450861417. The cubic root of 7819819816 is about 1984.8708273123.

The spelling of 7819819816 in words is "seven billion, eight hundred nineteen million, eight hundred nineteen thousand, eight hundred sixteen".