78311326671 has 12 divisors (see below), whose sum is σ = 113260102072. Its totient is φ = 52141208976.

The previous prime is 78311326619. The next prime is 78311326721. The reversal of 78311326671 is 17662311387.

78311326671 is a `hidden beast` number, since 7 + 8 + 311 + 3 + 266 + 71 = 666.

It is not a de Polignac number, because 78311326671 - 2¹⁰ = 78311325647 is a prime.

It is a super-2 number, since 2×78311326671² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78311326271) 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 in 11 ways as a sum of consecutive naturals, for example, 5521036 + ... + 5535201.

Almost surely, 2^78311326671 is an apocalyptic number.

78311326671 is a deficient number, since it is larger than the sum of its proper divisors (34948775401).

78311326671 is a wasteful number, since it uses less digits than its factorization.

78311326671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057030 (or 11057027 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 78311326671 in words is "seventy-eight billion, three hundred eleven million, three hundred twenty-six thousand, six hundred seventy-one".