78193041193 has 4 divisors (see below), whose sum is σ = 78197158228. Its totient is φ = 78188924160.

The previous prime is 78193041109. The next prime is 78193041371. The reversal of 78193041193 is 39114039187.

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 25493870224 + 52699170969 = 159668^2 + 229563^2 .

It is a cyclic number.

It is not a de Polignac number, because 78193041193 - 2¹⁷ = 78192910121 is a prime.

It is a super-2 number, since 2×78193041193² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78193041593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029896 + ... + 2068057.

It is an arithmetic number, because the mean of its divisors is an integer number (19549289557).

Almost surely, 2^78193041193 is an apocalyptic number.

It is an amenable number.

78193041193 is a deficient number, since it is larger than the sum of its proper divisors (4117035).

78193041193 is a wasteful number, since it uses less digits than its factorization.

78193041193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117034.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 78193041193 in words is "seventy-eight billion, one hundred ninety-three million, forty-one thousand, one hundred ninety-three".