161145963 has 16 divisors (see below), whose sum is σ = 260438400. Its totient is φ = 97664040.

The previous prime is 161145961. The next prime is 161145991. The reversal of 161145963 is 369541161.

161145963 is a `hidden beast` number, since 1 + 61 + 1 + 4 + 596 + 3 = 666.

It is not a de Polignac number, because 161145963 - 2¹ = 161145961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161145961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270993 + ... + 271586.

It is an arithmetic number, because the mean of its divisors is an integer number (16277400).

Almost surely, 2^161145963 is an apocalyptic number.

161145963 is a deficient number, since it is larger than the sum of its proper divisors (99292437).

161145963 is a wasteful number, since it uses less digits than its factorization.

161145963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542599 (or 542593 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 161145963 is about 12694.3279853642. The cubic root of 161145963 is about 544.1765338165.

It can be divided in two parts, 1611 and 45963, that added together give a palindrome (47574).

The spelling of 161145963 in words is "one hundred sixty-one million, one hundred forty-five thousand, nine hundred sixty-three".