68188617115 has 16 divisors (see below), whose sum is σ = 86811217920. Its totient is φ = 51272857440.

The previous prime is 68188617113. The next prime is 68188617137. The reversal of 68188617115 is 51171688186.

It is not a de Polignac number, because 68188617115 - 2¹ = 68188617113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68188617113) 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, 2813821 + ... + 2837950.

It is an arithmetic number, because the mean of its divisors is an integer number (5425701120).

Almost surely, 2^68188617115 is an apocalyptic number.

68188617115 is a deficient number, since it is larger than the sum of its proper divisors (18622600805).

68188617115 is a wasteful number, since it uses less digits than its factorization.

68188617115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651922.

The product of its digits is 645120, while the sum is 52.

The spelling of 68188617115 in words is "sixty-eight billion, one hundred eighty-eight million, six hundred seventeen thousand, one hundred fifteen".