155520051105500 has 96 divisors (see below), whose sum is σ = 341693928576000. Its totient is φ = 61835342184000.

The previous prime is 155520051105469. The next prime is 155520051105557. The reversal of 155520051105500 is 5501150025551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101826491 + ... + 103342509.

It is an arithmetic number, because the mean of its divisors is an integer number (3559311756000).

Almost surely, 2^{155520051105500} is an apocalyptic number.

155520051105500 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 155520051105500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170846964288000).

155520051105500 is an abundant number, since it is smaller than the sum of its proper divisors (186173877470500).

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

155520051105500 is a wasteful number, since it uses less digits than its factorization.

155520051105500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517268 (or 1517256 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 35.

The spelling of 155520051105500 in words is "one hundred fifty-five trillion, five hundred twenty billion, fifty-one million, one hundred five thousand, five hundred".