7818756809616 has 135 divisors (see below), whose sum is σ = 22406504614299. Its totient is φ = 2545171989696.

The previous prime is 7818756809609. The next prime is 7818756809651. The reversal of 7818756809616 is 6169086578187.

The square root of 7818756809616 is 2796204.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×7818756809616² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1442838555 + ... + 1442843973.

Almost surely, 2^{7818756809616} is an apocalyptic number.

7818756809616 is the 2796204-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7818756809616

7818756809616 is an abundant number, since it is smaller than the sum of its proper divisors (14587747804683).

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

7818756809616 is an frugal number, since it uses more digits than its factorization.

7818756809616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10938 (or 5467 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 72.

The spelling of 7818756809616 in words is "seven trillion, eight hundred eighteen billion, seven hundred fifty-six million, eight hundred nine thousand, six hundred sixteen".