2145205143461 has 2 divisors, whose sum is σ = 2145205143462. Its totient is φ = 2145205143460.

The previous prime is 2145205143451. The next prime is 2145205143533. The reversal of 2145205143461 is 1643415025412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2110903881025 + 34301262436 = 1452895^2 + 185206^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145205143461 - 2¹⁴ = 2145205127077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145205143451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072602571730 + 1072602571731.

It is an arithmetic number, because the mean of its divisors is an integer number (1072602571731).

Almost surely, 2^{2145205143461} is an apocalyptic number.

It is an amenable number.

2145205143461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145205143461 is an equidigital number, since it uses as much as digits as its factorization.

2145205143461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 2145205143461 in words is "two trillion, one hundred forty-five billion, two hundred five million, one hundred forty-three thousand, four hundred sixty-one".