170672001681 has 4 divisors (see below), whose sum is σ = 227562668912. Its totient is φ = 113781334452.

The previous prime is 170672001659. The next prime is 170672001697. The reversal of 170672001681 is 186100276071.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 170672001681 - 2⁵ = 170672001649 is a prime.

It is a super-2 number, since 2×170672001681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170672001611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28445333611 + ... + 28445333616.

It is an arithmetic number, because the mean of its divisors is an integer number (56890667228).

Almost surely, 2^170672001681 is an apocalyptic number.

It is an amenable number.

170672001681 is a deficient number, since it is larger than the sum of its proper divisors (56890667231).

170672001681 is an equidigital number, since it uses as much as digits as its factorization.

170672001681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56890667230.

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 170672001681 in words is "one hundred seventy billion, six hundred seventy-two million, one thousand, six hundred eighty-one".