78218586258716 has 48 divisors (see below), whose sum is σ = 139753013299200. Its totient is φ = 38296840021440.

The previous prime is 78218586258707. The next prime is 78218586258721. The reversal of 78218586258716 is 61785268581287.

It is a super-2 number, since 2×78218586258716² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106600991 + ... + 107332233.

It is an arithmetic number, because the mean of its divisors is an integer number (2911521110400).

Almost surely, 2^{78218586258716} is an apocalyptic number.

It is an amenable number.

78218586258716 is a deficient number, since it is larger than the sum of its proper divisors (61534427040484).

78218586258716 is a wasteful number, since it uses less digits than its factorization.

78218586258716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733874 (or 733872 counting only the distinct ones).

The product of its digits is 722534400, while the sum is 74.

The spelling of 78218586258716 in words is "seventy-eight trillion, two hundred eighteen billion, five hundred eighty-six million, two hundred fifty-eight thousand, seven hundred sixteen".