155552542020 has 192 divisors, whose sum is σ = 492414612480. Its totient is φ = 40758681600.

The previous prime is 155552542007. The next prime is 155552542037. The reversal of 155552542020 is 20245255551.

155552542020 is a `hidden beast` number, since 1 + 55 + 552 + 54 + 2 + 0 + 2 + 0 = 666.

155552542020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 63 ways as a sum of consecutive naturals, for example, 10675540 + ... + 10690100.

It is an arithmetic number, because the mean of its divisors is an integer number (2564659440).

Almost surely, 2^155552542020 is an apocalyptic number.

155552542020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155552542020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246207306240).

155552542020 is an abundant number, since it is smaller than the sum of its proper divisors (336862070460).

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

155552542020 is a wasteful number, since it uses less digits than its factorization.

155552542020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923 (or 14915 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

Adding to 155552542020 its reverse (20245255551), we get a palindrome (175797797571).

The spelling of 155552542020 in words is "one hundred fifty-five billion, five hundred fifty-two million, five hundred forty-two thousand, twenty".