2155641512112 has 240 divisors, whose sum is σ = 6603949716000. Its totient is φ = 650974371840.

The previous prime is 2155641512107. The next prime is 2155641512117. The reversal of 2155641512112 is 2112151465512.

2155641512112 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 641 + 5 + 1 + 2 + 1 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2155641512107) and next prime (2155641512117).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2155641512117) 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, 1062414714 + ... + 1062416742.

It is an arithmetic number, because the mean of its divisors is an integer number (27516457150).

Almost surely, 2^{2155641512112} is an apocalyptic number.

2155641512112 is a gapful number since it is divisible by the number (22) 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 2155641512112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3301974858000).

2155641512112 is an abundant number, since it is smaller than the sum of its proper divisors (4448308203888).

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

2155641512112 is a wasteful number, since it uses less digits than its factorization.

2155641512112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036 (or 4027 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

Adding to 2155641512112 its reverse (2112151465512), we get a palindrome (4267792977624).

The spelling of 2155641512112 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, five hundred twelve thousand, one hundred twelve".