2155412000000 has 504 divisors, whose sum is σ = 6275638420800. Its totient is φ = 738528000000.

The previous prime is 2155411999987. The next prime is 2155412000033. The reversal of 2155412000000 is 2145512.

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

It is a congruent number.

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 55 ways as a sum of consecutive naturals, for example, 1371999215 + ... + 1372000785.

Almost surely, 2^{2155412000000} is an apocalyptic number.

2155412000000 is a gapful number since it is divisible by the number (20) 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 2155412000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137819210400).

2155412000000 is an abundant number, since it is smaller than the sum of its proper divisors (4120226420800).

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

2155412000000 is an frugal number, since it uses more digits than its factorization.

2155412000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 2155412000000 its reverse (2145512), we get a palindrome (2155414145512).

The spelling of 2155412000000 in words is "two trillion, one hundred fifty-five billion, four hundred twelve million", and thus it is an aban number.