2205651661155 has 32 divisors (see below), whose sum is σ = 3921255316800. Its totient is φ = 1176318510336.

The previous prime is 2205651661151. The next prime is 2205651661181. The reversal of 2205651661155 is 5511661565022.

It is a happy number.

2205651661155 is a `hidden beast` number, since 2 + 2 + 0 + 565 + 16 + 61 + 15 + 5 = 666.

It is not a de Polignac number, because 2205651661155 - 2² = 2205651661151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2205651661155.

It is not an unprimeable number, because it can be changed into a prime (2205651661151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5987551 + ... + 6345239.

It is an arithmetic number, because the mean of its divisors is an integer number (122539228650).

Almost surely, 2^{2205651661155} is an apocalyptic number.

2205651661155 is a deficient number, since it is larger than the sum of its proper divisors (1715603655645).

2205651661155 is a wasteful number, since it uses less digits than its factorization.

2205651661155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403380 (or 403374 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 2205651661155 in words is "two trillion, two hundred five billion, six hundred fifty-one million, six hundred sixty-one thousand, one hundred fifty-five".