78218584382271 has 32 divisors (see below), whose sum is σ = 104904742440960. Its totient is φ = 51839749958400.

The previous prime is 78218584382251. The next prime is 78218584382297. The reversal of 78218584382271 is 17228348581287.

It is not a de Polignac number, because 78218584382271 - 2⁶ = 78218584382207 is a prime.

It is a super-2 number, since 2×78218584382271² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78218584382251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3738748891 + ... + 3738769811.

It is an arithmetic number, because the mean of its divisors is an integer number (3278273201280).

Almost surely, 2^{78218584382271} is an apocalyptic number.

78218584382271 is a deficient number, since it is larger than the sum of its proper divisors (26686158058689).

78218584382271 is a wasteful number, since it uses less digits than its factorization.

78218584382271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28647.

The product of its digits is 96337920, while the sum is 66.

The spelling of 78218584382271 in words is "seventy-eight trillion, two hundred eighteen billion, five hundred eighty-four million, three hundred eighty-two thousand, two hundred seventy-one".