155345432993 has 2 divisors, whose sum is σ = 155345432994. Its totient is φ = 155345432992.

The previous prime is 155345432953. The next prime is 155345433043. The reversal of 155345432993 is 399234543551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101842042129 + 53503390864 = 319127^2 + 231308^2 .

It is an emirp because it is prime and its reverse (399234543551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155345432993 is a prime.

It is not a weakly prime, because it can be changed into another prime (155345432953) 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, 77672716496 + 77672716497.

It is an arithmetic number, because the mean of its divisors is an integer number (77672716497).

Almost surely, 2^155345432993 is an apocalyptic number.

It is an amenable number.

155345432993 is a deficient number, since it is larger than the sum of its proper divisors (1).

155345432993 is an equidigital number, since it uses as much as digits as its factorization.

155345432993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748000, while the sum is 53.

The spelling of 155345432993 in words is "one hundred fifty-five billion, three hundred forty-five million, four hundred thirty-two thousand, nine hundred ninety-three".