78582271291 has 4 divisors (see below), whose sum is σ = 78861923784. Its totient is φ = 78302618800.

The previous prime is 78582271279. The next prime is 78582271301. The reversal of 78582271291 is 19217228587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19217228587 = 17 ⋅1130425211.

It is a cyclic number.

It is not a de Polignac number, because 78582271291 - 2⁹ = 78582270779 is a prime.

It is a super-2 number, since 2×78582271291² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78582271241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139825825 + ... + 139826386.

It is an arithmetic number, because the mean of its divisors is an integer number (19715480946).

Almost surely, 2^78582271291 is an apocalyptic number.

78582271291 is a deficient number, since it is larger than the sum of its proper divisors (279652493).

78582271291 is a wasteful number, since it uses less digits than its factorization.

78582271291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279652492.

The product of its digits is 1128960, while the sum is 52.

The spelling of 78582271291 in words is "seventy-eight billion, five hundred eighty-two million, two hundred seventy-one thousand, two hundred ninety-one".