155442121342 has 32 divisors (see below), whose sum is σ = 241312740192. Its totient is φ = 75059946624.

The previous prime is 155442121313. The next prime is 155442121357. The reversal of 155442121342 is 243121244551.

It is a junction number, because it is equal to n+sod(n) for n = 155442121298 and 155442121307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1737048 + ... + 1824340.

It is an arithmetic number, because the mean of its divisors is an integer number (7541023131).

Almost surely, 2^155442121342 is an apocalyptic number.

155442121342 is a deficient number, since it is larger than the sum of its proper divisors (85870618850).

155442121342 is a wasteful number, since it uses less digits than its factorization.

155442121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87612.

The product of its digits is 38400, while the sum is 34.

Adding to 155442121342 its reverse (243121244551), we get a palindrome (398563365893).

The spelling of 155442121342 in words is "one hundred fifty-five billion, four hundred forty-two million, one hundred twenty-one thousand, three hundred forty-two".