78242536572740 has 24 divisors (see below), whose sum is σ = 164311178391360. Its totient is φ = 31296661945568.

The previous prime is 78242536572713. The next prime is 78242536572751. The reversal of 78242536572740 is 4727563524287.

It is a super-2 number, since 2×78242536572740² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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, 20219882 + ... + 23776641.

It is an arithmetic number, because the mean of its divisors is an integer number (6846299099640).

Almost surely, 2^{78242536572740} is an apocalyptic number.

It is an amenable number.

78242536572740 is an abundant number, since it is smaller than the sum of its proper divisors (86068641818620).

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

78242536572740 is a wasteful number, since it uses less digits than its factorization.

78242536572740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44085451 (or 44085449 counting only the distinct ones).

The product of its (nonzero) digits is 158054400, while the sum is 62.

The spelling of 78242536572740 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred thirty-six million, five hundred seventy-two thousand, seven hundred forty".