68136811396 has 12 divisors (see below), whose sum is σ = 119241914652. Its totient is φ = 34067692928.

The previous prime is 68136811339. The next prime is 68136811397. The reversal of 68136811396 is 69311863186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8937055296 + 59199756100 = 94536^2 + 243310^2 .

It is not an unprimeable number, because it can be changed into a prime (68136811397) 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, 77736 + ... + 377248.

It is an arithmetic number, because the mean of its divisors is an integer number (9936826221).

Almost surely, 2^68136811396 is an apocalyptic number.

It is an amenable number.

68136811396 is a deficient number, since it is larger than the sum of its proper divisors (51105103256).

68136811396 is a wasteful number, since it uses less digits than its factorization.

68136811396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356390 (or 356388 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 52.

The spelling of 68136811396 in words is "sixty-eight billion, one hundred thirty-six million, eight hundred eleven thousand, three hundred ninety-six".