7859821364 has 12 divisors (see below), whose sum is σ = 13758519684. Its totient is φ = 3928815744.

The previous prime is 7859821363. The next prime is 7859821379. The reversal of 7859821364 is 4631289587.

It can be written as a sum of positive squares in 2 ways, for example, as 2309571364 + 5550250000 = 48058^2 + 74500^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7859821363) 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 3 ways as a sum of consecutive naturals, for example, 257477 + ... + 286380.

It is an arithmetic number, because the mean of its divisors is an integer number (1146543307).

Almost surely, 2^7859821364 is an apocalyptic number.

It is an amenable number.

7859821364 is a deficient number, since it is larger than the sum of its proper divisors (5898698320).

7859821364 is a wasteful number, since it uses less digits than its factorization.

7859821364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547474 (or 547472 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 7859821364 is about 88655.6335717026. The cubic root of 7859821364 is about 1988.2495456127.

The spelling of 7859821364 in words is "seven billion, eight hundred fifty-nine million, eight hundred twenty-one thousand, three hundred sixty-four".