189087564964 has 9 divisors (see below), whose sum is σ = 330904760641. Its totient is φ = 94543347640.

The previous prime is 189087564961. The next prime is 189087565097. The reversal of 189087564964 is 469465780981.

It is a happy number.

The square root of 189087564964 is 434842.

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

It can be written as a sum of positive squares in only one way, i.e., 172425918564 + 16661646400 = 415242^2 + 129080^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189087564964.

It is not an unprimeable number, because it can be changed into a prime (189087564961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 760974 + ... + 978394.

Almost surely, 2^189087564964 is an apocalyptic number.

189087564964 is the 434842-nd square number.

It is an amenable number.

189087564964 is a deficient number, since it is larger than the sum of its proper divisors (141817195677).

189087564964 is an frugal number, since it uses more digits than its factorization.

189087564964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434846 (or 217423 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 189087564964 in words is "one hundred eighty-nine billion, eighty-seven million, five hundred sixty-four thousand, nine hundred sixty-four".