78281612167 has 8 divisors (see below), whose sum is σ = 86243649552. Its totient is φ = 70460496000.

The previous prime is 78281612147. The next prime is 78281612177. The reversal of 78281612167 is 76121618287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78281612167 is a prime.

It is a super-2 number, since 2×78281612167² (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 78281612167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78281612147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35229138 + ... + 35231359.

It is an arithmetic number, because the mean of its divisors is an integer number (10780456194).

Almost surely, 2^78281612167 is an apocalyptic number.

78281612167 is a deficient number, since it is larger than the sum of its proper divisors (7962037385).

78281612167 is a wasteful number, since it uses less digits than its factorization.

78281612167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70460609.

The product of its digits is 451584, while the sum is 49.

The spelling of 78281612167 in words is "seventy-eight billion, two hundred eighty-one million, six hundred twelve thousand, one hundred sixty-seven".