244736994681 has 27 divisors (see below), whose sum is σ = 357197549007. Its totient is φ = 161473017600.

The previous prime is 244736994647. The next prime is 244736994703. The reversal of 244736994681 is 186499637442.

It is a happy number.

The square root of 244736994681 is 494709.

It is a perfect power (a square), and thus also a powerful number.

244736994681 is a `hidden beast` number, since 2 + 44 + 73 + 69 + 9 + 468 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 244125916281 + 611078400 = 494091^2 + 24720^2 .

It is not a de Polignac number, because 244736994681 - 2⁷ = 244736994553 is a prime.

It is a super-2 number, since 2×244736994681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (244736994181) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 152864281 + ... + 152865881.

Almost surely, 2^244736994681 is an apocalyptic number.

244736994681 is the 494709-th square number.

244736994681 is the 247355-th centered octagonal number.

It is an amenable number.

244736994681 is a deficient number, since it is larger than the sum of its proper divisors (112460554326).

244736994681 is an frugal number, since it uses more digits than its factorization.

244736994681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414 (or 1707 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 244736994681 in words is "two hundred forty-four billion, seven hundred thirty-six million, nine hundred ninety-four thousand, six hundred eighty-one".