170809112643 has 64 divisors (see below), whose sum is σ = 261105868800. Its totient is φ = 98455824000.

The previous prime is 170809112641. The next prime is 170809112651. The reversal of 170809112643 is 346211908071.

It is a happy number.

It is not a de Polignac number, because 170809112643 - 2¹ = 170809112641 is a prime.

It is a super-5 number, since 5×170809112643⁵ (a number of 57 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 170809112595 and 170809112604.

It is not an unprimeable number, because it can be changed into a prime (170809112641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25849446 + ... + 25856052.

It is an arithmetic number, because the mean of its divisors is an integer number (4079779200).

Almost surely, 2^170809112643 is an apocalyptic number.

170809112643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

170809112643 is a deficient number, since it is larger than the sum of its proper divisors (90296756157).

170809112643 is a wasteful number, since it uses less digits than its factorization.

170809112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 170809112643 in words is "one hundred seventy billion, eight hundred nine million, one hundred twelve thousand, six hundred forty-three".