155544023142 has 80 divisors (see below), whose sum is σ = 357494794272. Its totient is φ = 50518235520.

The previous prime is 155544023137. The next prime is 155544023149. The reversal of 155544023142 is 241320445551.

155544023142 is a `hidden beast` number, since 1 + 5 + 55 + 440 + 23 + 142 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 155544023097 and 155544023106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155544023149) 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 in 39 ways as a sum of consecutive naturals, for example, 5278983 + ... + 5308365.

Almost surely, 2^155544023142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155544023142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178747397136).

155544023142 is an abundant number, since it is smaller than the sum of its proper divisors (201950771130).

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

155544023142 is a wasteful number, since it uses less digits than its factorization.

155544023142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30235 (or 30226 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 155544023142 its reverse (241320445551), we get a palindrome (396864468693).

The spelling of 155544023142 in words is "one hundred fifty-five billion, five hundred forty-four million, twenty-three thousand, one hundred forty-two".