78442671271 has 8 divisors (see below), whose sum is σ = 81240145920. Its totient is φ = 75651367008.

The previous prime is 78442671257. The next prime is 78442671317. The reversal of 78442671271 is 17217624487.

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

It is a cyclic number.

It is not a de Polignac number, because 78442671271 - 2⁷ = 78442671143 is a prime.

It is a super-2 number, since 2×78442671271² (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 (78442678271) 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, 1516711 + ... + 1567576.

It is an arithmetic number, because the mean of its divisors is an integer number (10155018240).

Almost surely, 2^78442671271 is an apocalyptic number.

78442671271 is a deficient number, since it is larger than the sum of its proper divisors (2797474649).

78442671271 is a wasteful number, since it uses less digits than its factorization.

78442671271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085193.

The product of its digits is 1053696, while the sum is 49.

The spelling of 78442671271 in words is "seventy-eight billion, four hundred forty-two million, six hundred seventy-one thousand, two hundred seventy-one".