244121261661 has 12 divisors (see below), whose sum is σ = 352769236092. Its totient is φ = 162678445056.

The previous prime is 244121261653. The next prime is 244121261663. The reversal of 244121261661 is 166162121442.

244121261661 is a `hidden beast` number, since 24 + 4 + 1 + 2 + 12 + 616 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 167776256025 + 76345005636 = 409605^2 + 276306^2 .

It is not a de Polignac number, because 244121261661 - 2³ = 244121261653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244121261663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5732836 + ... + 5775261.

It is an arithmetic number, because the mean of its divisors is an integer number (29397436341).

Almost surely, 2^244121261661 is an apocalyptic number.

It is an amenable number.

244121261661 is a deficient number, since it is larger than the sum of its proper divisors (108647974431).

244121261661 is a wasteful number, since it uses less digits than its factorization.

244121261661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11510460 (or 11510457 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The spelling of 244121261661 in words is "two hundred forty-four billion, one hundred twenty-one million, two hundred sixty-one thousand, six hundred sixty-one".