68913486013 has 18 divisors (see below), whose sum is σ = 71640809214. Its totient is φ = 66241506672.

The previous prime is 68913486011. The next prime is 68913486017. The reversal of 68913486013 is 31068431986.

It can be written as a sum of positive squares in only one way, i.e., 67050959364 + 1862526649 = 258942^2 + 43157^2 .

It is not a de Polignac number, because 68913486013 - 2¹ = 68913486011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68913486011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 164471118 + ... + 164471536.

Almost surely, 2^68913486013 is an apocalyptic number.

It is an amenable number.

68913486013 is a deficient number, since it is larger than the sum of its proper divisors (2727323201).

68913486013 is an frugal number, since it uses more digits than its factorization.

68913486013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 68913486013 in words is "sixty-eight billion, nine hundred thirteen million, four hundred eighty-six thousand, thirteen".