171785078056 has 16 divisors (see below), whose sum is σ = 322585797600. Its totient is φ = 85762198704.

The previous prime is 171785078053. The next prime is 171785078071. The reversal of 171785078056 is 650870587171.

171785078056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×171785078056² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 171785077988 and 171785078006.

It is not an unprimeable number, because it can be changed into a prime (171785078053) 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 3 ways as a sum of consecutive naturals, for example, 16286940 + ... + 16297483.

It is an arithmetic number, because the mean of its divisors is an integer number (20161612350).

Almost surely, 2^171785078056 is an apocalyptic number.

It is an amenable number.

171785078056 is a deficient number, since it is larger than the sum of its proper divisors (150800719544).

171785078056 is a wasteful number, since it uses less digits than its factorization.

171785078056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32585088 (or 32585084 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 55.

The spelling of 171785078056 in words is "one hundred seventy-one billion, seven hundred eighty-five million, seventy-eight thousand, fifty-six".