2165655005 has 8 divisors (see below), whose sum is σ = 2600193624. Its totient is φ = 1731585600.

The previous prime is 2165654989. The next prime is 2165655013. The reversal of 2165655005 is 5005565612.

It can be written as a sum of positive squares in 4 ways, for example, as 82919236 + 2082735769 = 9106^2 + 45637^2 .

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

It is not a de Polignac number, because 2165655005 - 2⁴ = 2165654989 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 7 ways as a sum of consecutive naturals, for example, 107066 + ... + 125675.

It is an arithmetic number, because the mean of its divisors is an integer number (325024203).

Almost surely, 2^2165655005 is an apocalyptic number.

It is an amenable number.

2165655005 is a deficient number, since it is larger than the sum of its proper divisors (434538619).

2165655005 is a wasteful number, since it uses less digits than its factorization.

2165655005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234607.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 2165655005 is about 46536.5985542562. The cubic root of 2165655005 is about 1293.7879179222.

The spelling of 2165655005 in words is "two billion, one hundred sixty-five million, six hundred fifty-five thousand, five".