78275376178 has 4 divisors (see below), whose sum is σ = 117413064270. Its totient is φ = 39137688088.

The previous prime is 78275376173. The next prime is 78275376203. The reversal of 78275376178 is 87167357287.

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

It can be written as a sum of positive squares in only one way, i.e., 71755944129 + 6519432049 = 267873^2 + 80743^2 .

It is a super-2 number, since 2×78275376178² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78275376173) 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 as a sum of consecutive naturals, namely, 19568844043 + ... + 19568844046.

Almost surely, 2^78275376178 is an apocalyptic number.

78275376178 is a deficient number, since it is larger than the sum of its proper divisors (39137688092).

78275376178 is a wasteful number, since it uses less digits than its factorization.

78275376178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39137688091.

The product of its digits is 27659520, while the sum is 61.

The spelling of 78275376178 in words is "seventy-eight billion, two hundred seventy-five million, three hundred seventy-six thousand, one hundred seventy-eight".