68738011685 has 48 divisors (see below), whose sum is σ = 99337278960. Its totient is φ = 45474508800.

The previous prime is 68738011619. The next prime is 68738011687. The reversal of 68738011685 is 58611083786.

It can be written as a sum of positive squares in 8 ways, for example, as 11913940801 + 56824070884 = 109151^2 + 238378^2 .

It is not a de Polignac number, because 68738011685 - 2¹² = 68738007589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68738011687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12054335 + ... + 12060035.

It is an arithmetic number, because the mean of its divisors is an integer number (2069526645).

Almost surely, 2^68738011685 is an apocalyptic number.

It is an amenable number.

68738011685 is a deficient number, since it is larger than the sum of its proper divisors (30599267275).

68738011685 is a wasteful number, since it uses less digits than its factorization.

68738011685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446 (or 7439 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 68738011685 in words is "sixty-eight billion, seven hundred thirty-eight million, eleven thousand, six hundred eighty-five".