194649838464 has 32 divisors (see below), whose sum is σ = 517038634440. Its totient is φ = 64883279360.

The previous prime is 194649838463. The next prime is 194649838501. The reversal of 194649838464 is 464838946491.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×194649838464² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194649838395 and 194649838404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194649838463) 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, 253449927 + ... + 253450694.

Almost surely, 2^194649838464 is an apocalyptic number.

It is an amenable number.

194649838464 is an abundant number, since it is smaller than the sum of its proper divisors (322388795976).

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

194649838464 is an equidigital number, since it uses as much as digits as its factorization.

194649838464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506900638 (or 506900626 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 66.

The spelling of 194649838464 in words is "one hundred ninety-four billion, six hundred forty-nine million, eight hundred thirty-eight thousand, four hundred sixty-four".