161945463 has 16 divisors (see below), whose sum is σ = 220962816. Its totient is φ = 105474240.

The previous prime is 161945453. The next prime is 161945491. The reversal of 161945463 is 364549161.

It is not a de Polignac number, because 161945463 - 2⁸ = 161945207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161945453) by changing a digit.

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, 19978 + ... + 26888.

It is an arithmetic number, because the mean of its divisors is an integer number (13810176).

Almost surely, 2^161945463 is an apocalyptic number.

161945463 is a deficient number, since it is larger than the sum of its proper divisors (59017353).

161945463 is a wasteful number, since it uses less digits than its factorization.

161945463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094.

The product of its digits is 77760, while the sum is 39.

The square root of 161945463 is about 12725.7794653216. The cubic root of 161945463 is about 545.0749979555.

The spelling of 161945463 in words is "one hundred sixty-one million, nine hundred forty-five thousand, four hundred sixty-three".