68081628785 has 16 divisors (see below), whose sum is σ = 82059135312. Its totient is φ = 54224640000.

The previous prime is 68081628773. The next prime is 68081628803. The reversal of 68081628785 is 58782618086.

It can be written as a sum of positive squares in 8 ways, for example, as 2772759649 + 65308869136 = 52657^2 + 255556^2 .

It is not a de Polignac number, because 68081628785 - 2³⁰ = 67007886961 is a prime.

It is a Duffinian 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, 7559285 + ... + 7568285.

It is an arithmetic number, because the mean of its divisors is an integer number (5128695957).

Almost surely, 2^68081628785 is an apocalyptic number.

It is an amenable number.

68081628785 is a deficient number, since it is larger than the sum of its proper divisors (13977506527).

68081628785 is a wasteful number, since it uses less digits than its factorization.

68081628785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15524.

The product of its (nonzero) digits is 10321920, while the sum is 59.

The spelling of 68081628785 in words is "sixty-eight billion, eighty-one million, six hundred twenty-eight thousand, seven hundred eighty-five".