1720665143163 has 6 divisors (see below), whose sum is σ = 2485405206804. Its totient is φ = 1147110095436.

The previous prime is 1720665143123. The next prime is 1720665143201. The reversal of 1720665143163 is 3613415660271.

1720665143163 is a `hidden beast` number, since 1 + 7 + 206 + 6 + 5 + 1 + 431 + 6 + 3 = 666.

It is not a de Polignac number, because 1720665143163 - 2¹⁰ = 1720665142139 is a prime.

It is a super-2 number, since 2×1720665143163² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1720665143123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95592507945 + ... + 95592507962.

It is an arithmetic number, because the mean of its divisors is an integer number (414234201134).

Almost surely, 2^{1720665143163} is an apocalyptic number.

1720665143163 is a deficient number, since it is larger than the sum of its proper divisors (764740063641).

1720665143163 is a wasteful number, since it uses less digits than its factorization.

1720665143163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191185015913 (or 191185015910 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 1720665143163 in words is "one trillion, seven hundred twenty billion, six hundred sixty-five million, one hundred forty-three thousand, one hundred sixty-three".