68737747885 has 8 divisors (see below), whose sum is σ = 82611618840. Its totient is φ = 54905984064.

The previous prime is 68737747877. The next prime is 68737747919. The reversal of 68737747885 is 58874773786.

It can be written as a sum of positive squares in 4 ways, for example, as 2394927844 + 66342820041 = 48938^2 + 257571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68737747885 - 2³ = 68737747877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10523190 + ... + 10529719.

It is an arithmetic number, because the mean of its divisors is an integer number (10326452355).

Almost surely, 2^68737747885 is an apocalyptic number.

It is an amenable number.

68737747885 is a deficient number, since it is larger than the sum of its proper divisors (13873870955).

68737747885 is a wasteful number, since it uses less digits than its factorization.

68737747885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21053567.

The product of its digits is 442552320, while the sum is 70.

The spelling of 68737747885 in words is "sixty-eight billion, seven hundred thirty-seven million, seven hundred forty-seven thousand, eight hundred eighty-five".