194894725489 has 32 divisors (see below), whose sum is σ = 222291578880. Its totient is φ = 169733958912.

The previous prime is 194894725483. The next prime is 194894725573. The reversal of 194894725489 is 984527498491.

It is a cyclic number.

It is not a de Polignac number, because 194894725489 - 2⁹ = 194894724977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194894725483) 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, 7623282 + ... + 7648804.

It is an arithmetic number, because the mean of its divisors is an integer number (6946611840).

Almost surely, 2^194894725489 is an apocalyptic number.

194894725489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194894725489 is a deficient number, since it is larger than the sum of its proper divisors (27396853391).

194894725489 is a wasteful number, since it uses less digits than its factorization.

194894725489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26109.

The product of its digits is 209018880, while the sum is 70.

The spelling of 194894725489 in words is "one hundred ninety-four billion, eight hundred ninety-four million, seven hundred twenty-five thousand, four hundred eighty-nine".