78229958171 has 4 divisors (see below), whose sum is σ = 78989472432. Its totient is φ = 77470443912.

The previous prime is 78229958159. The next prime is 78229958189. The reversal of 78229958171 is 17185992287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17185992287 = 31793 ⋅540559.

It is a cyclic number.

It is not a de Polignac number, because 78229958171 - 2³⁴ = 61050088987 is a prime.

It is a super-2 number, since 2×78229958171² (a number of 23 digits) contains 22 as substring.

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 78229958171.

It is not an unprimeable number, because it can be changed into a prime (78229958111) 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, 379756976 + ... + 379757181.

It is an arithmetic number, because the mean of its divisors is an integer number (19747368108).

Almost surely, 2^78229958171 is an apocalyptic number.

78229958171 is a deficient number, since it is larger than the sum of its proper divisors (759514261).

78229958171 is a wasteful number, since it uses less digits than its factorization.

78229958171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759514260.

The product of its digits is 5080320, while the sum is 59.

The spelling of 78229958171 in words is "seventy-eight billion, two hundred twenty-nine million, nine hundred fifty-eight thousand, one hundred seventy-one".