68591959919 has 16 divisors (see below), whose sum is σ = 80288133120. Its totient is φ = 57381735840.

The previous prime is 68591959867. The next prime is 68591959949. The reversal of 68591959919 is 91995919586.

It is a cyclic number.

It is not a de Polignac number, because 68591959919 - 2¹² = 68591955823 is a prime.

It is a super-2 number, since 2×68591959919² (a number of 22 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 (68591959949) 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, 413129 + ... + 554850.

It is an arithmetic number, because the mean of its divisors is an integer number (5018008320).

Almost surely, 2^68591959919 is an apocalyptic number.

68591959919 is a deficient number, since it is larger than the sum of its proper divisors (11696173201).

68591959919 is a wasteful number, since it uses less digits than its factorization.

68591959919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968230.

The product of its digits is 70858800, while the sum is 71.

The spelling of 68591959919 in words is "sixty-eight billion, five hundred ninety-one million, nine hundred fifty-nine thousand, nine hundred nineteen".