170870778647 has 24 divisors (see below), whose sum is σ = 183390637920. Its totient is φ = 159097086720.

The previous prime is 170870778629. The next prime is 170870778691. The reversal of 170870778647 is 746877078071.

170870778647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170870778647 - 2²⁰ = 170869730071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170870778647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170870778347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9903254 + ... + 9920492.

It is an arithmetic number, because the mean of its divisors is an integer number (7641276580).

Almost surely, 2^170870778647 is an apocalyptic number.

170870778647 is a deficient number, since it is larger than the sum of its proper divisors (12519859273).

170870778647 is a wasteful number, since it uses less digits than its factorization.

170870778647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17783 (or 17760 counting only the distinct ones).

The product of its (nonzero) digits is 25815552, while the sum is 62.

The spelling of 170870778647 in words is "one hundred seventy billion, eight hundred seventy million, seven hundred seventy-eight thousand, six hundred forty-seven".