155120440205332 has 48 divisors (see below), whose sum is σ = 312147593533440. Its totient is φ = 66071616151392.

The previous prime is 155120440205287. The next prime is 155120440205371. The reversal of 155120440205332 is 233502044021551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155120440205291 and 155120440205300.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 783626553 + ... + 783824479.

It is an arithmetic number, because the mean of its divisors is an integer number (6503074865280).

Almost surely, 2^{155120440205332} is an apocalyptic number.

It is an amenable number.

155120440205332 is an abundant number, since it is smaller than the sum of its proper divisors (157027153328108).

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

155120440205332 is a wasteful number, since it uses less digits than its factorization.

155120440205332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369820 (or 369818 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 155120440205332 its reverse (233502044021551), we get a palindrome (388622484226883).

The spelling of 155120440205332 in words is "one hundred fifty-five trillion, one hundred twenty billion, four hundred forty million, two hundred five thousand, three hundred thirty-two".