2155051120056 has 32 divisors (see below), whose sum is σ = 5391106026000. Its totient is φ = 717886609920.

The previous prime is 2155051120051. The next prime is 2155051120093. The reversal of 2155051120056 is 6500211505512.

It is a junction number, because it is equal to n+sod(n) for n = 2155051119999 and 2155051120026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155051120051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28947265 + ... + 29021616.

Almost surely, 2^{2155051120056} is an apocalyptic number.

It is an amenable number.

2155051120056 is an abundant number, since it is smaller than the sum of its proper divisors (3236054905944).

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

2155051120056 is a wasteful number, since it uses less digits than its factorization.

2155051120056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57970439 (or 57970435 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 2155051120056 its reverse (6500211505512), we get a palindrome (8655262625568).

The spelling of 2155051120056 in words is "two trillion, one hundred fifty-five billion, fifty-one million, one hundred twenty thousand, fifty-six".