78333334177 has 6 divisors (see below), whose sum is σ = 91122450018. Its totient is φ = 67142857824.

The previous prime is 78333334141. The next prime is 78333334193. The reversal of 78333334177 is 77143333387.

It can be written as a sum of positive squares in only one way, i.e., 67928518161 + 10404816016 = 260631^2 + 102004^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78333334177 is a prime.

It is a super-2 number, since 2×78333334177² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1598639473 = 78333334177 / (7 + 8 + 3 + 3 + 3 + 3 + 3 + 4 + 1 + 7 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78333334177.

It is not an unprimeable number, because it can be changed into a prime (78333331177) 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, 799319688 + ... + 799319785.

It is an arithmetic number, because the mean of its divisors is an integer number (15187075003).

Almost surely, 2^78333334177 is an apocalyptic number.

It is an amenable number.

78333334177 is a deficient number, since it is larger than the sum of its proper divisors (12789115841).

78333334177 is a wasteful number, since it uses less digits than its factorization.

78333334177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598639487 (or 1598639480 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 49.

The spelling of 78333334177 in words is "seventy-eight billion, three hundred thirty-three million, three hundred thirty-four thousand, one hundred seventy-seven".