162643566 has 32 divisors (see below), whose sum is σ = 329269248. Its totient is φ = 53555040.

The previous prime is 162643549. The next prime is 162643627. The reversal of 162643566 is 665346261.

It is a super-2 number, since 2×162643566² = 52905859122392712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351051 + ... + 351513.

It is an arithmetic number, because the mean of its divisors is an integer number (10289664).

Almost surely, 2^162643566 is an apocalyptic number.

162643566 is an abundant number, since it is smaller than the sum of its proper divisors (166625682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

162643566 is a wasteful number, since it uses less digits than its factorization.

162643566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its digits is 155520, while the sum is 39.

The square root of 162643566 is about 12753.1786625923. The cubic root of 162643566 is about 545.8570987509.

The spelling of 162643566 in words is "one hundred sixty-two million, six hundred forty-three thousand, five hundred sixty-six".