2155615322205 has 8 divisors (see below), whose sum is σ = 3448984515552. Its totient is φ = 1149661505168.

The previous prime is 2155615322191. The next prime is 2155615322213. The reversal of 2155615322205 is 5022235165512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2155615322205 - 2⁵ = 2155615322173 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 71853844059 + ... + 71853844088.

It is an arithmetic number, because the mean of its divisors is an integer number (431123064444).

Almost surely, 2^{2155615322205} is an apocalyptic number.

It is an amenable number.

2155615322205 is a deficient number, since it is larger than the sum of its proper divisors (1293369193347).

2155615322205 is a wasteful number, since it uses less digits than its factorization.

2155615322205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143707688155.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 2155615322205 in words is "two trillion, one hundred fifty-five billion, six hundred fifteen million, three hundred twenty-two thousand, two hundred five".