155538538543 has 2 divisors, whose sum is σ = 155538538544. Its totient is φ = 155538538542.

The previous prime is 155538538513. The next prime is 155538538553. The reversal of 155538538543 is 345835835551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155538538543 - 2¹⁷ = 155538407471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155538538513) 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, 77769269271 + 77769269272.

It is an arithmetic number, because the mean of its divisors is an integer number (77769269272).

Almost surely, 2^155538538543 is an apocalyptic number.

155538538543 is a deficient number, since it is larger than the sum of its proper divisors (1).

155538538543 is an equidigital number, since it uses as much as digits as its factorization.

155538538543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600000, while the sum is 55.

The spelling of 155538538543 in words is "one hundred fifty-five billion, five hundred thirty-eight million, five hundred thirty-eight thousand, five hundred forty-three".