68686508145 has 16 divisors (see below), whose sum is σ = 109903550400. Its totient is φ = 36631091904.

The previous prime is 68686508123. The next prime is 68686508179. The reversal of 68686508145 is 54180568686.

It is a happy number.

It is not a de Polignac number, because 68686508145 - 2⁵ = 68686508113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266631 + ... + 456579.

It is an arithmetic number, because the mean of its divisors is an integer number (6868971900).

Almost surely, 2^68686508145 is an apocalyptic number.

It is an amenable number.

68686508145 is a deficient number, since it is larger than the sum of its proper divisors (41217042255).

68686508145 is a wasteful number, since it uses less digits than its factorization.

68686508145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214064.

The product of its (nonzero) digits is 11059200, while the sum is 57.

The spelling of 68686508145 in words is "sixty-eight billion, six hundred eighty-six million, five hundred eight thousand, one hundred forty-five".