2155411655 has 4 divisors (see below), whose sum is σ = 2586493992. Its totient is φ = 1724329320.

The previous prime is 2155411639. The next prime is 2155411663. The reversal of 2155411655 is 5561145512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2155411655 - 2⁴ = 2155411639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215541161 + ... + 215541170.

It is an arithmetic number, because the mean of its divisors is an integer number (646623498).

Almost surely, 2^2155411655 is an apocalyptic number.

2155411655 is a deficient number, since it is larger than the sum of its proper divisors (431082337).

2155411655 is an equidigital number, since it uses as much as digits as its factorization.

2155411655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431082336.

The product of its digits is 30000, while the sum is 35.

The square root of 2155411655 is about 46426.4111794138. The cubic root of 2155411655 is about 1291.7448605501.

The spelling of 2155411655 in words is "two billion, one hundred fifty-five million, four hundred eleven thousand, six hundred fifty-five".