78179510177 has 2 divisors, whose sum is σ = 78179510178. Its totient is φ = 78179510176.

The previous prime is 78179510069. The next prime is 78179510179. The reversal of 78179510177 is 77101597187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74990536336 + 3188973841 = 273844^2 + 56471^2 .

It is a cyclic number.

It is not a de Polignac number, because 78179510177 - 2¹⁴ = 78179493793 is a prime.

It is a super-2 number, since 2×78179510177² (a number of 23 digits) contains 22 as substring.

Together with 78179510179, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78179510179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39089755088 + 39089755089.

It is an arithmetic number, because the mean of its divisors is an integer number (39089755089).

Almost surely, 2^78179510177 is an apocalyptic number.

It is an amenable number.

78179510177 is a deficient number, since it is larger than the sum of its proper divisors (1).

78179510177 is an equidigital number, since it uses as much as digits as its factorization.

78179510177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 53.

The spelling of 78179510177 in words is "seventy-eight billion, one hundred seventy-nine million, five hundred ten thousand, one hundred seventy-seven".