194966402500 has 45 divisors (see below), whose sum is σ = 426400813531. Its totient is φ = 77977730000.

The previous prime is 194966402431. The next prime is 194966402509. The reversal of 194966402500 is 5204669491.

The square root of 194966402500 is 441550.

It is a perfect power (a square), and thus also a powerful number.

194966402500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15285365956 + 179681036544 = 123634^2 + 423888^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194966402509) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 22073085 + ... + 22081915.

Almost surely, 2^194966402500 is an apocalyptic number.

194966402500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194966402500 is the 441550-th square number.

It is an amenable number.

194966402500 is an abundant number, since it is smaller than the sum of its proper divisors (231434411031).

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

194966402500 is an frugal number, since it uses more digits than its factorization.

194966402500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17686 (or 8838 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 194966402500 in words is "one hundred ninety-four billion, nine hundred sixty-six million, four hundred two thousand, five hundred".