254211664665 has 32 divisors (see below), whose sum is σ = 465231465216. Its totient is φ = 116114227200.

The previous prime is 254211664631. The next prime is 254211664669. The reversal of 254211664665 is 566466112452.

It is a happy number.

It is not a de Polignac number, because 254211664665 - 2²³ = 254203276057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (254211664669) 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, 881832 + ... + 1134041.

It is an arithmetic number, because the mean of its divisors is an integer number (14538483288).

Almost surely, 2^254211664665 is an apocalyptic number.

It is an amenable number.

254211664665 is a deficient number, since it is larger than the sum of its proper divisors (211019800551).

254211664665 is a wasteful number, since it uses less digits than its factorization.

254211664665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017089.

The product of its digits is 2073600, while the sum is 48.

The spelling of 254211664665 in words is "two hundred fifty-four billion, two hundred eleven million, six hundred sixty-four thousand, six hundred sixty-five".