78360164381 has 4 divisors (see below), whose sum is σ = 78363862332. Its totient is φ = 78356466432.

The previous prime is 78360164321. The next prime is 78360164417. The reversal of 78360164381 is 18346106387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47965380100 + 30394784281 = 219010^2 + 174341^2 .

It is a cyclic number.

It is not a de Polignac number, because 78360164381 - 2¹⁸ = 78359902237 is a prime.

It is a super-2 number, since 2×78360164381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78360164321) 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 3 ways as a sum of consecutive naturals, for example, 1817006 + ... + 1859631.

It is an arithmetic number, because the mean of its divisors is an integer number (19590965583).

Almost surely, 2^78360164381 is an apocalyptic number.

It is an amenable number.

78360164381 is a deficient number, since it is larger than the sum of its proper divisors (3697951).

78360164381 is a wasteful number, since it uses less digits than its factorization.

78360164381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697950.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 78360164381 in words is "seventy-eight billion, three hundred sixty million, one hundred sixty-four thousand, three hundred eighty-one".