155320223552 has 224 divisors, whose sum is σ = 363224064000. Its totient is φ = 65256192000.

The previous prime is 155320223549. The next prime is 155320223557. The reversal of 155320223552 is 255322023551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155320223557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73996199 + ... + 73998297.

It is an arithmetic number, because the mean of its divisors is an integer number (1621536000).

Almost surely, 2^155320223552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155320223552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181612032000).

155320223552 is an abundant number, since it is smaller than the sum of its proper divisors (207903840448).

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

155320223552 is a wasteful number, since it uses less digits than its factorization.

155320223552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 155320223552 in words is "one hundred fifty-five billion, three hundred twenty million, two hundred twenty-three thousand, five hundred fifty-two".