155440312134242 has 8 divisors (see below), whose sum is σ = 233211746083536. Its totient is φ = 77703063439732.

The previous prime is 155440312134203. The next prime is 155440312134259. The reversal of 155440312134242 is 242431213044551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155440312134242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8546302328 + ... + 8546320515.

It is an arithmetic number, because the mean of its divisors is an integer number (29151468260442).

Almost surely, 2^{155440312134242} is an apocalyptic number.

155440312134242 is a deficient number, since it is larger than the sum of its proper divisors (77771433949294).

155440312134242 is a wasteful number, since it uses less digits than its factorization.

155440312134242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17092627392.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 155440312134242 its reverse (242431213044551), we get a palindrome (397871525178793).

The spelling of 155440312134242 in words is "one hundred fifty-five trillion, four hundred forty billion, three hundred twelve million, one hundred thirty-four thousand, two hundred forty-two".