155243242884 has 12 divisors (see below), whose sum is σ = 362234233424. Its totient is φ = 51747747624.

The previous prime is 155243242873. The next prime is 155243242901. The reversal of 155243242884 is 488242342551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×155243242884² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6468468442 + ... + 6468468465.

Almost surely, 2^155243242884 is an apocalyptic number.

It is an amenable number.

155243242884 is an abundant number, since it is smaller than the sum of its proper divisors (206990990540).

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

155243242884 is a wasteful number, since it uses less digits than its factorization.

155243242884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12936936914 (or 12936936912 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 48.

The spelling of 155243242884 in words is "one hundred fifty-five billion, two hundred forty-three million, two hundred forty-two thousand, eight hundred eighty-four".