194559864663 has 32 divisors (see below), whose sum is σ = 277671961600. Its totient is φ = 120820377600.

The previous prime is 194559864661. The next prime is 194559864689. The reversal of 194559864663 is 366468955491.

It is not a de Polignac number, because 194559864663 - 2¹ = 194559864661 is a prime.

It is a super-2 number, since 2×194559864663² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194559864594 and 194559864603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194559864661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995583 + ... + 1174863.

It is an arithmetic number, because the mean of its divisors is an integer number (8677248800).

Almost surely, 2^194559864663 is an apocalyptic number.

194559864663 is a deficient number, since it is larger than the sum of its proper divisors (83112096937).

194559864663 is a wasteful number, since it uses less digits than its factorization.

194559864663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179623.

The product of its digits is 167961600, while the sum is 66.

The spelling of 194559864663 in words is "one hundred ninety-four billion, five hundred fifty-nine million, eight hundred sixty-four thousand, six hundred sixty-three".