194645137744 has 20 divisors (see below), whose sum is σ = 386323125300. Its totient is φ = 94948847360.

The previous prime is 194645137721. The next prime is 194645137751. The reversal of 194645137744 is 447731546491.

It can be written as a sum of positive squares in 2 ways, for example, as 9820810000 + 184824327744 = 99100^2 + 429912^2 .

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, 148356919 + ... + 148358230.

It is an arithmetic number, because the mean of its divisors is an integer number (19316156265).

Almost surely, 2^194645137744 is an apocalyptic number.

It is an amenable number.

194645137744 is a deficient number, since it is larger than the sum of its proper divisors (191677987556).

194645137744 is a wasteful number, since it uses less digits than its factorization.

194645137744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296715198 (or 296715192 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The spelling of 194645137744 in words is "one hundred ninety-four billion, six hundred forty-five million, one hundred thirty-seven thousand, seven hundred forty-four".