78218842152583 has 16 divisors (see below), whose sum is σ = 85482200240640. Its totient is φ = 70980917358400.

The previous prime is 78218842152557. The next prime is 78218842152593. The reversal of 78218842152583 is 38525124881287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78218842152583 is a prime.

It is a super-2 number, since 2×78218842152583² (a number of 29 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 (78218842152593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228451428 + ... + 228793558.

It is an arithmetic number, because the mean of its divisors is an integer number (5342637515040).

Almost surely, 2^{78218842152583} is an apocalyptic number.

78218842152583 is a deficient number, since it is larger than the sum of its proper divisors (7263358088057).

78218842152583 is a wasteful number, since it uses less digits than its factorization.

78218842152583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379238.

The product of its digits is 68812800, while the sum is 64.

The spelling of 78218842152583 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred forty-two million, one hundred fifty-two thousand, five hundred eighty-three".