2065571655 has 32 divisors (see below), whose sum is σ = 3999227904. Its totient is φ = 888715776.

The previous prime is 2065571617. The next prime is 2065571659. The reversal of 2065571655 is 5561755602.

It is a happy number.

It is not a de Polignac number, because 2065571655 - 2⁶ = 2065571591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065571659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576807 + ... + 580376.

It is an arithmetic number, because the mean of its divisors is an integer number (124975872).

Almost surely, 2^2065571655 is an apocalyptic number.

2065571655 is a deficient number, since it is larger than the sum of its proper divisors (1933656249).

2065571655 is a wasteful number, since it uses less digits than its factorization.

2065571655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157215.

The product of its (nonzero) digits is 315000, while the sum is 42.

The square root of 2065571655 is about 45448.5605382613. The cubic root of 2065571655 is about 1273.5424389480.

The spelling of 2065571655 in words is "two billion, sixty-five million, five hundred seventy-one thousand, six hundred fifty-five".