2155000440155 has 16 divisors (see below), whose sum is σ = 2593839710880. Its totient is φ = 1718781940992.

The previous prime is 2155000440133. The next prime is 2155000440157. The reversal of 2155000440155 is 5510440005512.

It is a cyclic number.

It is not a de Polignac number, because 2155000440155 - 2¹⁸ = 2155000178011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155000440157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1757777 + ... + 2720253.

It is an arithmetic number, because the mean of its divisors is an integer number (162114981930).

Almost surely, 2^{2155000440155} is an apocalyptic number.

2155000440155 is a deficient number, since it is larger than the sum of its proper divisors (438839270725).

2155000440155 is an equidigital number, since it uses as much as digits as its factorization.

2155000440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963838.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 2155000440155 its reverse (5510440005512), we get a palindrome (7665440445667).

The spelling of 2155000440155 in words is "two trillion, one hundred fifty-five billion, four hundred forty thousand, one hundred fifty-five".