7816800840 has 32 divisors (see below), whose sum is σ = 23450402880. Its totient is φ = 2084480192.

The previous prime is 7816800701. The next prime is 7816800919. The reversal of 7816800840 is 480086187.

It is a super-2 number, since 2×7816800840² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7816800792 and 7816800801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32569884 + ... + 32570123.

It is an arithmetic number, because the mean of its divisors is an integer number (732825090).

Almost surely, 2^7816800840 is an apocalyptic number.

It is an amenable number.

7816800840 is an abundant number, since it is smaller than the sum of its proper divisors (15633602040).

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

7816800840 is a wasteful number, since it uses less digits than its factorization.

7816800840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65140021 (or 65140017 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 7816800840 is about 88412.6735259148. The cubic root of 7816800840 is about 1984.6153632548.

The spelling of 7816800840 in words is "seven billion, eight hundred sixteen million, eight hundred thousand, eight hundred forty".