78322539850 has 24 divisors (see below), whose sum is σ = 149233096908. Its totient is φ = 30564892800.

The previous prime is 78322539817. The next prime is 78322539853. The reversal of 78322539850 is 5893522387.

It can be written as a sum of positive squares in 6 ways, for example, as 282206401 + 78040333449 = 16799^2 + 279357^2 .

It is a super-2 number, since 2×78322539850² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78322539853) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19101009 + ... + 19105108.

Almost surely, 2^78322539850 is an apocalyptic number.

78322539850 is a deficient number, since it is larger than the sum of its proper divisors (70910557058).

78322539850 is a wasteful number, since it uses less digits than its factorization.

78322539850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38206170 (or 38206165 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 78322539850 in words is "seventy-eight billion, three hundred twenty-two million, five hundred thirty-nine thousand, eight hundred fifty".