254211664643 has 4 divisors (see below), whose sum is σ = 267591225960. Its totient is φ = 240832103328.

The previous prime is 254211664631. The next prime is 254211664669. The reversal of 254211664643 is 346466112452.

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

It is a cyclic number.

It is not a de Polignac number, because 254211664643 - 2¹⁴ = 254211648259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 254211664594 and 254211664603.

It is not an unprimeable number, because it can be changed into a prime (254211664613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6689780630 + ... + 6689780667.

It is an arithmetic number, because the mean of its divisors is an integer number (66897806490).

Almost surely, 2^254211664643 is an apocalyptic number.

254211664643 is a deficient number, since it is larger than the sum of its proper divisors (13379561317).

254211664643 is a wasteful number, since it uses less digits than its factorization.

254211664643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13379561316.

The product of its digits is 829440, while the sum is 44.

The spelling of 254211664643 in words is "two hundred fifty-four billion, two hundred eleven million, six hundred sixty-four thousand, six hundred forty-three".