155556010000 has 100 divisors (see below), whose sum is σ = 377130001644. Its totient is φ = 62137600000.

The previous prime is 155556009997. The next prime is 155556010033. The reversal of 155556010000 is 10655551.

It can be written as a sum of positive squares in 10 ways, for example, as 139884976144 + 15671033856 = 374012^2 + 125184^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7599780 + ... + 7620220.

Almost surely, 2^155556010000 is an apocalyptic number.

155556010000 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 155556010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188565000822).

155556010000 is an abundant number, since it is smaller than the sum of its proper divisors (221573991644).

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

155556010000 is an equidigital number, since it uses as much as digits as its factorization.

155556010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21230 (or 21209 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

Adding to 155556010000 its reverse (10655551), we get a palindrome (155566665551).

The spelling of 155556010000 in words is "one hundred fifty-five billion, five hundred fifty-six million, ten thousand".