44781431923449 has 135 divisors (see below), whose sum is σ = 71498886289467. Its totient is φ = 27008694288576.

The previous prime is 44781431923439. The next prime is 44781431923531. The reversal of 44781431923449 is 94432913418744.

It is a happy number.

The square root of 44781431923449 is 6691893.

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

44781431923449 is a `hidden beast` number, since 4 + 4 + 7 + 81 + 4 + 319 + 234 + 4 + 9 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 28510954389225 + 16270477534224 = 5339565^2 + 4033668^2 .

It is not a de Polignac number, because 44781431923449 - 2²⁵ = 44781398369017 is a prime.

It is a super-2 number, since 2×44781431923449² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44781431923439) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 227316913219 + ... + 227316913415.

Almost surely, 2^{44781431923449} is an apocalyptic number.

44781431923449 is the 6691893-rd square number.

44781431923449 is the 3345947-th centered octagonal number.

It is an amenable number.

44781431923449 is a deficient number, since it is larger than the sum of its proper divisors (26717454366018).

44781431923449 is an frugal number, since it uses more digits than its factorization.

44781431923449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 280 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 63.

The spelling of 44781431923449 in words is "forty-four trillion, seven hundred eighty-one billion, four hundred thirty-one million, nine hundred twenty-three thousand, four hundred forty-nine".