7818616140 has 24 divisors (see below), whose sum is σ = 21892125360. Its totient is φ = 2084964288.

The previous prime is 7818616129. The next prime is 7818616193. The reversal of 7818616140 is 416168187.

It is a super-2 number, since 2×7818616140² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7818616092 and 7818616101.

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, 65155075 + ... + 65155194.

It is an arithmetic number, because the mean of its divisors is an integer number (912171890).

Almost surely, 2^7818616140 is an apocalyptic number.

It is an amenable number.

7818616140 is an abundant number, since it is smaller than the sum of its proper divisors (14073509220).

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

7818616140 is a wasteful number, since it uses less digits than its factorization.

7818616140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130310281 (or 130310279 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 7818616140 is about 88422.9389920964. The cubic root of 7818616140 is about 1984.7689808065.

The spelling of 7818616140 in words is "seven billion, eight hundred eighteen million, six hundred sixteen thousand, one hundred forty".