7818332013620 has 24 divisors (see below), whose sum is σ = 16467216819144. Its totient is φ = 3118052883456.

The previous prime is 7818332013607. The next prime is 7818332013623. The reversal of 7818332013620 is 263102338187.

It can be written as a sum of positive squares in 4 ways, for example, as 842848852624 + 6975483160996 = 918068^2 + 2641114^2 .

It is a super-2 number, since 2×7818332013620² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7818332013623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579988217 + ... + 580001696.

It is an arithmetic number, because the mean of its divisors is an integer number (686134034131).

Almost surely, 2^{7818332013620} is an apocalyptic number.

It is an amenable number.

7818332013620 is an abundant number, since it is smaller than the sum of its proper divisors (8648884805524).

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

7818332013620 is a wasteful number, since it uses less digits than its factorization.

7818332013620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159990259 (or 1159990257 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 7818332013620 in words is "seven trillion, eight hundred eighteen billion, three hundred thirty-two million, thirteen thousand, six hundred twenty".