68528391231 has 16 divisors (see below), whose sum is σ = 93635142656. Its totient is φ = 44556777216.

The previous prime is 68528391221. The next prime is 68528391247. The reversal of 68528391231 is 13219382586.

It is not a de Polignac number, because 68528391231 - 2⁶ = 68528391167 is a prime.

It is a super-2 number, since 2×68528391231² (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 (68528391221) 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, 307855 + ... + 481488.

It is an arithmetic number, because the mean of its divisors is an integer number (5852196416).

Almost surely, 2^68528391231 is an apocalyptic number.

68528391231 is a deficient number, since it is larger than the sum of its proper divisors (25106751425).

68528391231 is a wasteful number, since it uses less digits than its factorization.

68528391231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790062.

The product of its digits is 622080, while the sum is 48.

The spelling of 68528391231 in words is "sixty-eight billion, five hundred twenty-eight million, three hundred ninety-one thousand, two hundred thirty-one".