155055666560 has 128 divisors (see below), whose sum is σ = 392572051200. Its totient is φ = 58439817216.

The previous prime is 155055666547. The next prime is 155055666587. The reversal of 155055666560 is 65666550551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 155055666499 and 155055666508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907631 + ... + 1064849.

It is an arithmetic number, because the mean of its divisors is an integer number (3066969150).

Almost surely, 2^155055666560 is an apocalyptic number.

155055666560 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 155055666560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196286025600).

155055666560 is an abundant number, since it is smaller than the sum of its proper divisors (237516384640).

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

155055666560 is a wasteful number, since it uses less digits than its factorization.

155055666560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157328 (or 157316 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 155055666560 in words is "one hundred fifty-five billion, fifty-five million, six hundred sixty-six thousand, five hundred sixty".