171643010649 has 16 divisors (see below), whose sum is σ = 252134472384. Its totient is φ = 102996104000.

The previous prime is 171643010629. The next prime is 171643010657. The reversal of 171643010649 is 946010346171.

It is a cyclic number.

It is not a de Polignac number, because 171643010649 - 2¹¹ = 171643008601 is a prime.

It is a super-2 number, since 2×171643010649² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 171643010649.

It is not an unprimeable number, because it can be changed into a prime (171643010629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25745694 + ... + 25752359.

It is an arithmetic number, because the mean of its divisors is an integer number (15758404524).

Almost surely, 2^171643010649 is an apocalyptic number.

It is an amenable number.

171643010649 is a deficient number, since it is larger than the sum of its proper divisors (80491461735).

171643010649 is a wasteful number, since it uses less digits than its factorization.

171643010649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51498168.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 171643010649 in words is "one hundred seventy-one billion, six hundred forty-three million, ten thousand, six hundred forty-nine".