68813498539 has 4 divisors (see below), whose sum is σ = 72435261640. Its totient is φ = 65191735440.

The previous prime is 68813498521. The next prime is 68813498573. The reversal of 68813498539 is 93589431886.

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

It is a cyclic number.

It is not a de Polignac number, because 68813498539 - 2²¹ = 68811401387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68813498519) 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, 1810881522 + ... + 1810881559.

It is an arithmetic number, because the mean of its divisors is an integer number (18108815410).

Almost surely, 2^68813498539 is an apocalyptic number.

68813498539 is a deficient number, since it is larger than the sum of its proper divisors (3621763101).

68813498539 is a wasteful number, since it uses less digits than its factorization.

68813498539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621763100.

The product of its digits is 44789760, while the sum is 64.

The spelling of 68813498539 in words is "sixty-eight billion, eight hundred thirteen million, four hundred ninety-eight thousand, five hundred thirty-nine".