1145644721129 has 2 divisors, whose sum is σ = 1145644721130. Its totient is φ = 1145644721128.

The previous prime is 1145644721057. The next prime is 1145644721131. The reversal of 1145644721129 is 9211274465411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981803539600 + 163841181529 = 990860^2 + 404773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145644721129 is a prime.

Together with 1145644721131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1145644721159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572822360564 + 572822360565.

It is an arithmetic number, because the mean of its divisors is an integer number (572822360565).

Almost surely, 2^{1145644721129} is an apocalyptic number.

It is an amenable number.

1145644721129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145644721129 is an equidigital number, since it uses as much as digits as its factorization.

1145644721129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The spelling of 1145644721129 in words is "one trillion, one hundred forty-five billion, six hundred forty-four million, seven hundred twenty-one thousand, one hundred twenty-nine".