194889927145888 has 24 divisors (see below), whose sum is σ = 413204124382308. Its totient is φ = 89949197144064.

The previous prime is 194889927145847. The next prime is 194889927145889. The reversal of 194889927145888 is 888541729988491.

It can be written as a sum of positive squares in 2 ways, for example, as 189241072146064 + 5648854999824 = 13756492^2 + 2376732^2 .

It is not an unprimeable number, because it can be changed into a prime (194889927145889) 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, 234242700481 + ... + 234242701312.

Almost surely, 2^{194889927145888} is an apocalyptic number.

It is an amenable number.

194889927145888 is an abundant number, since it is smaller than the sum of its proper divisors (218314197236420).

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

194889927145888 is a wasteful number, since it uses less digits than its factorization.

194889927145888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468485401816 (or 468485401808 counting only the distinct ones).

The product of its digits is 26754416640, while the sum is 91.

The spelling of 194889927145888 in words is "one hundred ninety-four trillion, eight hundred eighty-nine billion, nine hundred twenty-seven million, one hundred forty-five thousand, eight hundred eighty-eight".