155245553055320 has 128 divisors (see below), whose sum is σ = 429988714444800. Its totient is φ = 49123749735936.

The previous prime is 155245553055311. The next prime is 155245553055403. The reversal of 155245553055320 is 23550355542551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16225247 + ... + 23953073.

It is an arithmetic number, because the mean of its divisors is an integer number (3359286831600).

Almost surely, 2^{155245553055320} is an apocalyptic number.

155245553055320 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 155245553055320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214994357222400).

155245553055320 is an abundant number, since it is smaller than the sum of its proper divisors (274743161389480).

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

155245553055320 is a wasteful number, since it uses less digits than its factorization.

155245553055320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733377 (or 7733373 counting only the distinct ones).

The product of its (nonzero) digits is 11250000, while the sum is 50.

The spelling of 155245553055320 in words is "one hundred fifty-five trillion, two hundred forty-five billion, five hundred fifty-three million, fifty-five thousand, three hundred twenty".