189861364602361 has 9 divisors (see below), whose sum is σ = 192738348297999. Its totient is φ = 187026703476624.

The previous prime is 189861364602317. The next prime is 189861364602373. The reversal of 189861364602361 is 163206463168981.

The square root of 189861364602361 is 13779019.

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., 52335458205625 + 137525906396736 = 7234325^2 + 11727144^2 .

It is not a de Polignac number, because 189861364602361 - 2⁷ = 189861364602233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189861364602293 and 189861364602302.

It is not an unprimeable number, because it can be changed into a prime (189861364602311) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 923091445 + ... + 923297101.

It is an arithmetic number, because the mean of its divisors is an integer number (21415372033111).

Almost surely, 2^{189861364602361} is an apocalyptic number.

189861364602361 is the 13779019-th square number.

189861364602361 is the 6889510-th centered octagonal number.

It is an amenable number.

189861364602361 is a deficient number, since it is larger than the sum of its proper divisors (2876983695638).

189861364602361 is an frugal number, since it uses more digits than its factorization.

189861364602361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411448 (or 205724 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 64.

The spelling of 189861364602361 in words is "one hundred eighty-nine trillion, eight hundred sixty-one billion, three hundred sixty-four million, six hundred two thousand, three hundred sixty-one".