194889665264 has 20 divisors (see below), whose sum is σ = 431541401904. Its totient is φ = 83524142208.

The previous prime is 194889665251. The next prime is 194889665291. The reversal of 194889665264 is 462566988491.

It is a junction number, because it is equal to n+sod(n) for n = 194889665194 and 194889665203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870043037 + ... + 870043260.

Almost surely, 2^194889665264 is an apocalyptic number.

194889665264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

194889665264 is an abundant number, since it is smaller than the sum of its proper divisors (236651736640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194889665264 is a wasteful number, since it uses less digits than its factorization.

194889665264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740086312 (or 1740086306 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 68.

The spelling of 194889665264 in words is "one hundred ninety-four billion, eight hundred eighty-nine million, six hundred sixty-five thousand, two hundred sixty-four".