194144563 has 6 divisors (see below), whose sum is σ = 194941604. Its totient is φ = 193350744.

The previous prime is 194144521. The next prime is 194144567. The reversal of 194144563 is 365441491.

194144563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-194144563 is a prime.

It is a super-2 number, since 2×194144563² = 75384222684921938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194144567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71020 + ... + 73702.

Almost surely, 2^194144563 is an apocalyptic number.

194144563 is a deficient number, since it is larger than the sum of its proper divisors (797041).

194144563 is an frugal number, since it uses more digits than its factorization.

194144563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221 (or 2952 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 194144563 is about 13933.5768200416. The cubic root of 194144563 is about 579.0397935111.

The spelling of 194144563 in words is "one hundred ninety-four million, one hundred forty-four thousand, five hundred sixty-three".