78326961671 has 8 divisors (see below), whose sum is σ = 89539470720. Its totient is φ = 67120188408.

The previous prime is 78326961667. The next prime is 78326961737. The reversal of 78326961671 is 17616962387.

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

It is not a de Polignac number, because 78326961671 - 2² = 78326961667 is a prime.

It is a super-2 number, since 2×78326961671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78326961631) 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 7 ways as a sum of consecutive naturals, for example, 1404641 + ... + 1459338.

It is an arithmetic number, because the mean of its divisors is an integer number (11192433840).

Almost surely, 2^78326961671 is an apocalyptic number.

78326961671 is a deficient number, since it is larger than the sum of its proper divisors (11212509049).

78326961671 is a wasteful number, since it uses less digits than its factorization.

78326961671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867893.

The product of its digits is 4572288, while the sum is 56.

The spelling of 78326961671 in words is "seventy-eight billion, three hundred twenty-six million, nine hundred sixty-one thousand, six hundred seventy-one".