155859655680 has 528 divisors, whose sum is σ = 593076163680. Its totient is φ = 39112409088.

The previous prime is 155859655673. The next prime is 155859655681. The reversal of 155859655680 is 86556958551.

155859655680 is a `hidden beast` number, since 1 + 5 + 5 + 8 + 5 + 9 + 65 + 568 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155859655681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21147036 + ... + 21154404.

It is an arithmetic number, because the mean of its divisors is an integer number (1123250310).

Almost surely, 2^155859655680 is an apocalyptic number.

155859655680 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 155859655680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296538081840).

155859655680 is an abundant number, since it is smaller than the sum of its proper divisors (437216508000).

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

155859655680 is an equidigital number, since it uses as much as digits as its factorization.

155859655680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 64800000, while the sum is 63.

The spelling of 155859655680 in words is "one hundred fifty-five billion, eight hundred fifty-nine million, six hundred fifty-five thousand, six hundred eighty".