161442663 has 4 divisors (see below), whose sum is σ = 215256888. Its totient is φ = 107628440.

The previous prime is 161442653. The next prime is 161442667. The reversal of 161442663 is 366244161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161442663 - 2⁶ = 161442599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161442667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26907108 + ... + 26907113.

It is an arithmetic number, because the mean of its divisors is an integer number (53814222).

Almost surely, 2^161442663 is an apocalyptic number.

161442663 is a deficient number, since it is larger than the sum of its proper divisors (53814225).

161442663 is an equidigital number, since it uses as much as digits as its factorization.

161442663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53814224.

The product of its digits is 20736, while the sum is 33.

The square root of 161442663 is about 12706.0089327845. The cubic root of 161442663 is about 544.5103061407.

The spelling of 161442663 in words is "one hundred sixty-one million, four hundred forty-two thousand, six hundred sixty-three".