170203870081 has 12 divisors (see below), whose sum is σ = 200033419908. Its totient is φ = 144385016832.

The previous prime is 170203870073. The next prime is 170203870087. The reversal of 170203870081 is 180078302071.

It can be written as a sum of positive squares in 2 ways, for example, as 141300810000 + 28903060081 = 375900^2 + 170009^2 .

It is not a de Polignac number, because 170203870081 - 2³ = 170203870073 is a prime.

It is a super-2 number, since 2×170203870081² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 170203870081.

It is not an unprimeable number, because it can be changed into a prime (170203870087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17900136 + ... + 17909641.

It is an arithmetic number, because the mean of its divisors is an integer number (16669451659).

Almost surely, 2^170203870081 is an apocalyptic number.

It is an amenable number.

170203870081 is a deficient number, since it is larger than the sum of its proper divisors (29829549827).

170203870081 is an equidigital number, since it uses as much as digits as its factorization.

170203870081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35809888 (or 35809881 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 170203870081 in words is "one hundred seventy billion, two hundred three million, eight hundred seventy thousand, eighty-one".