145213454369 has 2 divisors, whose sum is σ = 145213454370. Its totient is φ = 145213454368.

The previous prime is 145213454251. The next prime is 145213454387. The reversal of 145213454369 is 963454312541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86024890000 + 59188564369 = 293300^2 + 243287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145213454369 is a prime.

It is a super-2 number, since 2×145213454369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145213474369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72606727184 + 72606727185.

It is an arithmetic number, because the mean of its divisors is an integer number (72606727185).

Almost surely, 2^145213454369 is an apocalyptic number.

It is an amenable number.

145213454369 is a deficient number, since it is larger than the sum of its proper divisors (1).

145213454369 is an equidigital number, since it uses as much as digits as its factorization.

145213454369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 47.

The spelling of 145213454369 in words is "one hundred forty-five billion, two hundred thirteen million, four hundred fifty-four thousand, three hundred sixty-nine".