189447785536 has 63 divisors (see below), whose sum is σ = 385618838997. Its totient is φ = 92343912960.

The previous prime is 189447785521. The next prime is 189447785573. The reversal of 189447785536 is 635587744981.

The square root of 189447785536 is 435256.

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

189447785536 is digitally balanced in base 2, 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 only one way, i.e., 9128655936 + 180319129600 = 95544^2 + 424640^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 142763305 + ... + 142764631.

Almost surely, 2^189447785536 is an apocalyptic number.

189447785536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

189447785536 is the 435256-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189447785536

189447785536 is an abundant number, since it is smaller than the sum of its proper divisors (196171053461).

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

189447785536 is an frugal number, since it uses more digits than its factorization.

189447785536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748 (or 1370 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 67.

The spelling of 189447785536 in words is "one hundred eighty-nine billion, four hundred forty-seven million, seven hundred eighty-five thousand, five hundred thirty-six".