1850152201209 has 27 divisors (see below), whose sum is σ = 2893910776653. Its totient is φ = 1138522555872.

The previous prime is 1850152201187. The next prime is 1850152201229. The reversal of 1850152201209 is 9021022510581.

The square root of 1850152201209 is 1360203.

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

1850152201209 is a `hidden beast` number, since 1 + 8 + 5 + 0 + 1 + 522 + 0 + 120 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19543201209 + 1830609000000 = 139797^2 + 1353000^2 .

It is not a de Polignac number, because 1850152201209 - 2⁹ = 1850152200697 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1850152201229) 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, 53030479 + ... + 53065355.

Almost surely, 2^{1850152201209} is an apocalyptic number.

1850152201209 is the 1360203-rd square number.

1850152201209 is the 680102-nd centered octagonal number.

It is an amenable number.

1850152201209 is a deficient number, since it is larger than the sum of its proper divisors (1043758575444).

1850152201209 is an frugal number, since it uses more digits than its factorization.

1850152201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69786 (or 34893 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

Multiplying 1850152201209 by its sum of digits (36), we get a square (66605479243524 = 8161218²).

The spelling of 1850152201209 in words is "one trillion, eight hundred fifty billion, one hundred fifty-two million, two hundred one thousand, two hundred nine".