161351563 has 8 divisors (see below), whose sum is σ = 167057280. Its totient is φ = 155655360.

The previous prime is 161351549. The next prime is 161351579. The reversal of 161351563 is 365153161.

161351563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 161351563 - 2²¹ = 159254411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161351513) 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, 62743 + ... + 65263.

It is an arithmetic number, because the mean of its divisors is an integer number (20882160).

Almost surely, 2^161351563 is an apocalyptic number.

161351563 is a deficient number, since it is larger than the sum of its proper divisors (5705717).

161351563 is a wasteful number, since it uses less digits than its factorization.

161351563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757.

The product of its digits is 8100, while the sum is 31.

The square root of 161351563 is about 12702.4235089214. The cubic root of 161351563 is about 544.4078668363.

The spelling of 161351563 in words is "one hundred sixty-one million, three hundred fifty-one thousand, five hundred sixty-three".