2161425652255 has 4 divisors (see below), whose sum is σ = 2593710782712. Its totient is φ = 1729140521800.

The previous prime is 2161425652171. The next prime is 2161425652271. The reversal of 2161425652255 is 5522565241612.

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

It is not a de Polignac number, because 2161425652255 - 2²⁷ = 2161291434527 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 216142565221 + ... + 216142565230.

It is an arithmetic number, because the mean of its divisors is an integer number (648427695678).

Almost surely, 2^{2161425652255} is an apocalyptic number.

2161425652255 is a deficient number, since it is larger than the sum of its proper divisors (432285130457).

2161425652255 is an equidigital number, since it uses as much as digits as its factorization.

2161425652255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432285130456.

The product of its digits is 1440000, while the sum is 46.

The spelling of 2161425652255 in words is "two trillion, one hundred sixty-one billion, four hundred twenty-five million, six hundred fifty-two thousand, two hundred fifty-five".