2155012015005 has 20 divisors (see below), whose sum is σ = 3863058575772. Its totient is φ = 1149339741120.

The previous prime is 2155012014997. The next prime is 2155012015049. The reversal of 2155012015005 is 5005102105512.

2155012015005 is a `hidden beast` number, since 2 + 1 + 5 + 501 + 2 + 0 + 150 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1696149383769 + 458862631236 = 1302363^2 + 677394^2 .

It is not a de Polignac number, because 2155012015005 - 2³ = 2155012014997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2155012015005.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 2660508256 + ... + 2660509065.

Almost surely, 2^{2155012015005} is an apocalyptic number.

It is an amenable number.

2155012015005 is a deficient number, since it is larger than the sum of its proper divisors (1708046560767).

2155012015005 is an equidigital number, since it uses as much as digits as its factorization.

2155012015005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5321017338 (or 5321017329 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The spelling of 2155012015005 in words is "two trillion, one hundred fifty-five billion, twelve million, fifteen thousand, five".