68070786173 has 6 divisors (see below), whose sum is σ = 73709786394. Its totient is φ = 62834571696.

The previous prime is 68070786169. The next prime is 68070786187. The reversal of 68070786173 is 37168707086.

It can be written as a sum of positive squares in 3 ways, for example, as 7102781284 + 60968004889 = 84278^2 + 246917^2 .

It is not a de Polignac number, because 68070786173 - 2² = 68070786169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68070786103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201392690 + ... + 201393027.

It is an arithmetic number, because the mean of its divisors is an integer number (12284964399).

Almost surely, 2^68070786173 is an apocalyptic number.

It is an amenable number.

68070786173 is a deficient number, since it is larger than the sum of its proper divisors (5639000221).

68070786173 is a wasteful number, since it uses less digits than its factorization.

68070786173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402785743 (or 402785730 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 68070786173 in words is "sixty-eight billion, seventy million, seven hundred eighty-six thousand, one hundred seventy-three".