145403630442449 has 2 divisors, whose sum is σ = 145403630442450. Its totient is φ = 145403630442448.

The previous prime is 145403630442409. The next prime is 145403630442571. The reversal of 145403630442449 is 944244036304541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139755711836224 + 5647918606225 = 11821832^2 + 2376535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145403630442449 is a prime.

It is a super-2 number, since 2×145403630442449² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145403630442449.

It is not a weakly prime, because it can be changed into another prime (145403630442409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72701815221224 + 72701815221225.

It is an arithmetic number, because the mean of its divisors is an integer number (72701815221225).

Almost surely, 2^{145403630442449} is an apocalyptic number.

It is an amenable number.

145403630442449 is a deficient number, since it is larger than the sum of its proper divisors (1).

145403630442449 is an equidigital number, since it uses as much as digits as its factorization.

145403630442449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19906560, while the sum is 53.

The spelling of 145403630442449 in words is "one hundred forty-five trillion, four hundred three billion, six hundred thirty million, four hundred forty-two thousand, four hundred forty-nine".