2165442665234 has 16 divisors (see below), whose sum is σ = 3312169659288. Its totient is φ = 1061419686912.

The previous prime is 2165442665233. The next prime is 2165442665263. The reversal of 2165442665234 is 4325662445612.

It can be written as a sum of positive squares in 4 ways, for example, as 2165297535025 + 145130209 = 1471495^2 + 12047^2 .

It is not an unprimeable number, because it can be changed into a prime (2165442665233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8264057 + ... + 8522060.

Almost surely, 2^{2165442665234} is an apocalyptic number.

2165442665234 is a deficient number, since it is larger than the sum of its proper divisors (1146726994054).

2165442665234 is a wasteful number, since it uses less digits than its factorization.

2165442665234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16787389.

The product of its digits is 8294400, while the sum is 50.

The spelling of 2165442665234 in words is "two trillion, one hundred sixty-five billion, four hundred forty-two million, six hundred sixty-five thousand, two hundred thirty-four".