1145542520209 has 2 divisors, whose sum is σ = 1145542520210. Its totient is φ = 1145542520208.

The previous prime is 1145542520131. The next prime is 1145542520219. The reversal of 1145542520209 is 9020252455411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680559001600 + 464983518609 = 824960^2 + 681897^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145542520209 - 2⁷ = 1145542520081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1145542520219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572771260104 + 572771260105.

It is an arithmetic number, because the mean of its divisors is an integer number (572771260105).

Almost surely, 2^{1145542520209} is an apocalyptic number.

It is an amenable number.

1145542520209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145542520209 is an equidigital number, since it uses as much as digits as its factorization.

1145542520209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 1145542520209 in words is "one trillion, one hundred forty-five billion, five hundred forty-two million, five hundred twenty thousand, two hundred nine".