161563126 has 8 divisors (see below), whose sum is σ = 247980744. Its totient is φ = 78902880.

The previous prime is 161563123. The next prime is 161563139. The reversal of 161563126 is 621365161.

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

It is a super-2 number, since 2×161563126² = 52205287365783752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161563123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939235 + ... + 939406.

It is an arithmetic number, because the mean of its divisors is an integer number (30997593).

Almost surely, 2^161563126 is an apocalyptic number.

161563126 is a deficient number, since it is larger than the sum of its proper divisors (86417618).

161563126 is a wasteful number, since it uses less digits than its factorization.

161563126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878686.

The product of its digits is 6480, while the sum is 31.

The square root of 161563126 is about 12710.7484437385. The cubic root of 161563126 is about 544.6457041329.

The spelling of 161563126 in words is "one hundred sixty-one million, five hundred sixty-three thousand, one hundred twenty-six".