68310077815 has 16 divisors (see below), whose sum is σ = 93686928192. Its totient is φ = 46838928384.

The previous prime is 68310077777. The next prime is 68310077821. The reversal of 68310077815 is 51877001386.

It is a cyclic number.

It is not a de Polignac number, because 68310077815 - 2¹⁷ = 68309946743 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1035397 + ... + 1099393.

It is an arithmetic number, because the mean of its divisors is an integer number (5855433012).

Almost surely, 2^68310077815 is an apocalyptic number.

68310077815 is a deficient number, since it is larger than the sum of its proper divisors (25376850377).

68310077815 is a wasteful number, since it uses less digits than its factorization.

68310077815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94506.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 68310077815 in words is "sixty-eight billion, three hundred ten million, seventy-seven thousand, eight hundred fifteen".