155542514123 has 2 divisors, whose sum is σ = 155542514124. Its totient is φ = 155542514122.

The previous prime is 155542514111. The next prime is 155542514173. The reversal of 155542514123 is 321415245551.

155542514123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155542514123 - 2⁴ = 155542514107 is a prime.

It is not a weakly prime, because it can be changed into another prime (155542514173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77771257061 + 77771257062.

It is an arithmetic number, because the mean of its divisors is an integer number (77771257062).

Almost surely, 2^155542514123 is an apocalyptic number.

155542514123 is a deficient number, since it is larger than the sum of its proper divisors (1).

155542514123 is an equidigital number, since it uses as much as digits as its factorization.

155542514123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120000, while the sum is 38.

Adding to 155542514123 its reverse (321415245551), we get a palindrome (476957759674).

The spelling of 155542514123 in words is "one hundred fifty-five billion, five hundred forty-two million, five hundred fourteen thousand, one hundred twenty-three".