194253475646 has 16 divisors (see below), whose sum is σ = 309982418640. Its totient is φ = 90980158080.

The previous prime is 194253475607. The next prime is 194253475651. The reversal of 194253475646 is 646574352491.

It is a super-2 number, since 2×194253475646² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 194253475591 and 194253475600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13531541 + ... + 13545888.

It is an arithmetic number, because the mean of its divisors is an integer number (19373901165).

Almost surely, 2^194253475646 is an apocalyptic number.

194253475646 is a deficient number, since it is larger than the sum of its proper divisors (115728942994).

194253475646 is a wasteful number, since it uses less digits than its factorization.

194253475646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27077659.

The product of its digits is 21772800, while the sum is 56.

The spelling of 194253475646 in words is "one hundred ninety-four billion, two hundred fifty-three million, four hundred seventy-five thousand, six hundred forty-six".