1899162366201 has 27 divisors (see below), whose sum is σ = 2762665158799. Its totient is φ = 1257202955472.

The previous prime is 1899162366187. The next prime is 1899162366289. The reversal of 1899162366201 is 1026632619981.

The square root of 1899162366201 is 1378101.

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

1899162366201 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 1 + 6 + 2 + 3 + 6 + 620 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 222499946601 + 1676662419600 = 471699^2 + 1294860^2 .

It is not a de Polignac number, because 1899162366201 - 2²⁷ = 1899028148473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1899162366701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 616009606 + ... + 616012688.

Almost surely, 2^{1899162366201} is an apocalyptic number.

1899162366201 is the 1378101-st square number.

1899162366201 is the 689051-st centered octagonal number.

It is an amenable number.

1899162366201 is a deficient number, since it is larger than the sum of its proper divisors (863502792598).

1899162366201 is an frugal number, since it uses more digits than its factorization.

1899162366201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470 (or 3235 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 1899162366201 in words is "one trillion, eight hundred ninety-nine billion, one hundred sixty-two million, three hundred sixty-six thousand, two hundred one".