162561623 has 8 divisors (see below), whose sum is σ = 186217248. Its totient is φ = 139014144.

The previous prime is 162561601. The next prime is 162561661. The reversal of 162561623 is 326165261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162561623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 162561623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162566623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23786 + ... + 29847.

It is an arithmetic number, because the mean of its divisors is an integer number (23277156).

Almost surely, 2^162561623 is an apocalyptic number.

162561623 is a deficient number, since it is larger than the sum of its proper divisors (23655625).

162561623 is an equidigital number, since it uses as much as digits as its factorization.

162561623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54073.

The product of its digits is 12960, while the sum is 32.

The square root of 162561623 is about 12749.9656077968. The cubic root of 162561623 is about 545.7654122013.

The spelling of 162561623 in words is "one hundred sixty-two million, five hundred sixty-one thousand, six hundred twenty-three".