68501648809 has 48 divisors (see below), whose sum is σ = 78791328000. Its totient is φ = 59437445760.

The previous prime is 68501648807. The next prime is 68501648819. The reversal of 68501648809 is 90884610586.

It is not a de Polignac number, because 68501648809 - 2¹ = 68501648807 is a prime.

It is a super-2 number, since 2×68501648809² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68501648809.

It is not an unprimeable number, because it can be changed into a prime (68501648807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183650347 + ... + 183650719.

It is an arithmetic number, because the mean of its divisors is an integer number (1641486000).

Almost surely, 2^68501648809 is an apocalyptic number.

It is an amenable number.

68501648809 is a deficient number, since it is larger than the sum of its proper divisors (10289679191).

68501648809 is a wasteful number, since it uses less digits than its factorization.

68501648809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 68501648809 in words is "sixty-eight billion, five hundred one million, six hundred forty-eight thousand, eight hundred nine".