78305870163 has 6 divisors (see below), whose sum is σ = 104408473132. Its totient is φ = 52203590320.

The previous prime is 78305870161. The next prime is 78305870171. The reversal of 78305870163 is 36107850387.

It is not a de Polignac number, because 78305870163 - 2¹ = 78305870161 is a prime.

It is a super-2 number, since 2×78305870163² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78305870161) 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 5 ways as a sum of consecutive naturals, for example, 403903 + ... + 565463.

Almost surely, 2^78305870163 is an apocalyptic number.

78305870163 is a deficient number, since it is larger than the sum of its proper divisors (26102602969).

78305870163 is an frugal number, since it uses more digits than its factorization.

78305870163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323125 (or 161564 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

Multiplying 78305870163 by its sum of digits (48), we get a square (3758681767824 = 1938732²).

The spelling of 78305870163 in words is "seventy-eight billion, three hundred five million, eight hundred seventy thousand, one hundred sixty-three".