68642264386719 has 40 divisors (see below), whose sum is σ = 104402616853040. Its totient is φ = 44934480100224.

The previous prime is 68642264386711. The next prime is 68642264386739. The reversal of 68642264386719 is 91768346224686.

68642264386719 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 226 + 4 + 386 + 7 + 19 = 666.

It is not a de Polignac number, because 68642264386719 - 2³ = 68642264386711 is a prime.

It is a super-4 number, since 4×68642264386719⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68642264386711) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18506284 + ... + 21903585.

It is an arithmetic number, because the mean of its divisors is an integer number (2610065421326).

Almost surely, 2^{68642264386719} is an apocalyptic number.

68642264386719 is a deficient number, since it is larger than the sum of its proper divisors (35760352466321).

68642264386719 is a wasteful number, since it uses less digits than its factorization.

68642264386719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40410261 (or 40410252 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 72.

The spelling of 68642264386719 in words is "sixty-eight trillion, six hundred forty-two billion, two hundred sixty-four million, three hundred eighty-six thousand, seven hundred nineteen".