78894897271 has 16 divisors (see below), whose sum is σ = 82572134400. Its totient is φ = 75286376928.

The previous prime is 78894897269. The next prime is 78894897281. The reversal of 78894897271 is 17279849887.

It is a cyclic number.

It is not a de Polignac number, because 78894897271 - 2¹ = 78894897269 is a prime.

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 78894897271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78894897281) 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 15 ways as a sum of consecutive naturals, for example, 855030 + ... + 942796.

It is an arithmetic number, because the mean of its divisors is an integer number (5160758400).

Almost surely, 2^78894897271 is an apocalyptic number.

78894897271 is a deficient number, since it is larger than the sum of its proper divisors (3677237129).

78894897271 is a wasteful number, since it uses less digits than its factorization.

78894897271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88158.

The product of its digits is 113799168, while the sum is 70.

The spelling of 78894897271 in words is "seventy-eight billion, eight hundred ninety-four million, eight hundred ninety-seven thousand, two hundred seventy-one".