244642134661 has 4 divisors (see below), whose sum is σ = 245287628800. Its totient is φ = 243996640524.

The previous prime is 244642134643. The next prime is 244642134679. The reversal of 244642134661 is 166431246442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (244642134643) and next prime (244642134679).

It is a cyclic number.

It is not a de Polignac number, because 244642134661 - 2³⁵ = 210282396293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244642134761) 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, 322746501 + ... + 322747258.

It is an arithmetic number, because the mean of its divisors is an integer number (61321907200).

Almost surely, 2^244642134661 is an apocalyptic number.

It is an amenable number.

244642134661 is a deficient number, since it is larger than the sum of its proper divisors (645494139).

244642134661 is an equidigital number, since it uses as much as digits as its factorization.

244642134661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645494138.

The product of its digits is 663552, while the sum is 43.

The spelling of 244642134661 in words is "two hundred forty-four billion, six hundred forty-two million, one hundred thirty-four thousand, six hundred sixty-one".