145471778329 has 2 divisors, whose sum is σ = 145471778330. Its totient is φ = 145471778328.

The previous prime is 145471778303. The next prime is 145471778357. The reversal of 145471778329 is 923877174541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84599539600 + 60872238729 = 290860^2 + 246723^2 .

It is a cyclic number.

It is not a de Polignac number, because 145471778329 - 2⁵ = 145471778297 is a prime.

It is a super-3 number, since 3×145471778329³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (145471778399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72735889164 + 72735889165.

It is an arithmetic number, because the mean of its divisors is an integer number (72735889165).

Almost surely, 2^145471778329 is an apocalyptic number.

It is an amenable number.

145471778329 is a deficient number, since it is larger than the sum of its proper divisors (1).

145471778329 is an equidigital number, since it uses as much as digits as its factorization.

145471778329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 58.

The spelling of 145471778329 in words is "one hundred forty-five billion, four hundred seventy-one million, seven hundred seventy-eight thousand, three hundred twenty-nine".