155523123450042 has 16 divisors (see below), whose sum is σ = 311046412369440. Its totient is φ = 51841013571792.

The previous prime is 155523123450011. The next prime is 155523123450047. The reversal of 155523123450042 is 240054321325551.

It is a junction number, because it is equal to n+sod(n) for n = 155523123449976 and 155523123450003.

It is not an unprimeable number, because it can be changed into a prime (155523123450047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7700733 + ... + 19244415.

It is an arithmetic number, because the mean of its divisors is an integer number (19440400773090).

Almost surely, 2^{155523123450042} is an apocalyptic number.

155523123450042 is an abundant number, since it is smaller than the sum of its proper divisors (155523288919398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155523123450042 is a wasteful number, since it uses less digits than its factorization.

155523123450042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13789117.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 155523123450042 its reverse (240054321325551), we get a palindrome (395577444775593).

The spelling of 155523123450042 in words is "one hundred fifty-five trillion, five hundred twenty-three billion, one hundred twenty-three million, four hundred fifty thousand, forty-two".