78382164318212 has 6 divisors (see below), whose sum is σ = 137168787556878. Its totient is φ = 39191082159104.

The previous prime is 78382164318197. The next prime is 78382164318223. The reversal of 78382164318212 is 21281346128387.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 75925151958016 + 2457012360196 = 8713504^2 + 1567486^2 .

It is a super-2 number, since 2×78382164318212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9797770539773 + ... + 9797770539780.

It is an arithmetic number, because the mean of its divisors is an integer number (22861464592813).

Almost surely, 2^{78382164318212} is an apocalyptic number.

It is an amenable number.

78382164318212 is a deficient number, since it is larger than the sum of its proper divisors (58786623238666).

78382164318212 is a wasteful number, since it uses less digits than its factorization.

78382164318212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19595541079557 (or 19595541079555 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 56.

The spelling of 78382164318212 in words is "seventy-eight trillion, three hundred eighty-two billion, one hundred sixty-four million, three hundred eighteen thousand, two hundred twelve".