145555509779 has 2 divisors, whose sum is σ = 145555509780. Its totient is φ = 145555509778.

The previous prime is 145555509751. The next prime is 145555509791. The reversal of 145555509779 is 977905555541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145555509779 - 2²⁸ = 145287074323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (145555509739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72777754889 + 72777754890.

It is an arithmetic number, because the mean of its divisors is an integer number (72777754890).

Almost surely, 2^145555509779 is an apocalyptic number.

145555509779 is a deficient number, since it is larger than the sum of its proper divisors (1).

145555509779 is an equidigital number, since it uses as much as digits as its factorization.

145555509779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49612500, while the sum is 62.

The spelling of 145555509779 in words is "one hundred forty-five billion, five hundred fifty-five million, five hundred nine thousand, seven hundred seventy-nine".