78236085738 has 16 divisors (see below), whose sum is σ = 156492666720. Its totient is φ = 26075279376.

The previous prime is 78236085677. The next prime is 78236085751. The reversal of 78236085738 is 83758063287.

It is a super-2 number, since 2×78236085738² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804120 + ... + 896147.

It is an arithmetic number, because the mean of its divisors is an integer number (9780791670).

Almost surely, 2^78236085738 is an apocalyptic number.

78236085738 is an abundant number, since it is smaller than the sum of its proper divisors (78256580982).

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

78236085738 is a wasteful number, since it uses less digits than its factorization.

78236085738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707941.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 78236085738 in words is "seventy-eight billion, two hundred thirty-six million, eighty-five thousand, seven hundred thirty-eight".