68888368081 has 16 divisors (see below), whose sum is σ = 75490873920. Its totient is φ = 62473377600.

The previous prime is 68888368079. The next prime is 68888368103. The reversal of 68888368081 is 18086388886.

It is a cyclic number.

It is not a de Polignac number, because 68888368081 - 2¹ = 68888368079 is a prime.

It is a super-2 number, since 2×68888368081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68888368181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272006 + ... + 1325056.

It is an arithmetic number, because the mean of its divisors is an integer number (4718179620).

Almost surely, 2^68888368081 is an apocalyptic number.

It is an amenable number.

68888368081 is a deficient number, since it is larger than the sum of its proper divisors (6602505839).

68888368081 is a wasteful number, since it uses less digits than its factorization.

68888368081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54816.

The product of its (nonzero) digits is 28311552, while the sum is 64.

The spelling of 68888368081 in words is "sixty-eight billion, eight hundred eighty-eight million, three hundred sixty-eight thousand, eighty-one".