194399503450 has 24 divisors (see below), whose sum is σ = 361910996928. Its totient is φ = 77689280880.

The previous prime is 194399503391. The next prime is 194399503451. The reversal of 194399503450 is 54305993491.

It is not an unprimeable number, because it can be changed into a prime (194399503451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1707312 + ... + 1817611.

It is an arithmetic number, because the mean of its divisors is an integer number (15079624872).

Almost surely, 2^194399503450 is an apocalyptic number.

194399503450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194399503450 is a deficient number, since it is larger than the sum of its proper divisors (167511493478).

194399503450 is a wasteful number, since it uses less digits than its factorization.

194399503450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3526038 (or 3526033 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 194399503450 in words is "one hundred ninety-four billion, three hundred ninety-nine million, five hundred three thousand, four hundred fifty".