155112300020000 has 120 divisors (see below), whose sum is σ = 381902684209200. Its totient is φ = 61995628832000.

The previous prime is 155112300019979. The next prime is 155112300020023. The reversal of 155112300020000 is 20003211551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22099931 + ... + 28260069.

It is an arithmetic number, because the mean of its divisors is an integer number (3182522368410).

Almost surely, 2^{155112300020000} is an apocalyptic number.

155112300020000 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 155112300020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190951342104600).

155112300020000 is an abundant number, since it is smaller than the sum of its proper divisors (226790384189200).

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

155112300020000 is an equidigital number, since it uses as much as digits as its factorization.

155112300020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6161428 (or 6161405 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 155112300020000 its reverse (20003211551), we get a palindrome (155132303231551).

The spelling of 155112300020000 in words is "one hundred fifty-five trillion, one hundred twelve billion, three hundred million, twenty thousand".