2145156234409 has 2 divisors, whose sum is σ = 2145156234410. Its totient is φ = 2145156234408.

The previous prime is 2145156234379. The next prime is 2145156234469. The reversal of 2145156234409 is 9044326515412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1745767625625 + 399388608784 = 1321275^2 + 631972^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145156234409 - 2⁹ = 2145156233897 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145156234469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072578117204 + 1072578117205.

It is an arithmetic number, because the mean of its divisors is an integer number (1072578117205).

Almost surely, 2^{2145156234409} is an apocalyptic number.

It is an amenable number.

2145156234409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145156234409 is an equidigital number, since it uses as much as digits as its factorization.

2145156234409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 2145156234409 in words is "two trillion, one hundred forty-five billion, one hundred fifty-six million, two hundred thirty-four thousand, four hundred nine".