68020715519 has 4 divisors (see below), whose sum is σ = 68840242296. Its totient is φ = 67201188744.

The previous prime is 68020715473. The next prime is 68020715551. The reversal of 68020715519 is 91551702086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68020715519 is a prime.

It is a super-2 number, since 2×68020715519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 68020715519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68020715569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409763264 + ... + 409763429.

It is an arithmetic number, because the mean of its divisors is an integer number (17210060574).

Almost surely, 2^68020715519 is an apocalyptic number.

68020715519 is a deficient number, since it is larger than the sum of its proper divisors (819526777).

68020715519 is an equidigital number, since it uses as much as digits as its factorization.

68020715519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819526776.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 68020715519 in words is "sixty-eight billion, twenty million, seven hundred fifteen thousand, five hundred nineteen".