43802722681 has 27 divisors (see below), whose sum is σ = 46132062093. Its totient is φ = 41590307520.

The previous prime is 43802722651. The next prime is 43802722687. The reversal of 43802722681 is 18622720834.

The square root of 43802722681 is 209291.

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

It can be written as a sum of positive squares in 4 ways, for example, as 11432955625 + 32369767056 = 106925^2 + 179916^2 .

It is not a de Polignac number, because 43802722681 - 2⁹ = 43802722169 is a prime.

It is a super-2 number, since 2×43802722681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43802722687) 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, 600037261 + ... + 600037333.

Almost surely, 2^43802722681 is an apocalyptic number.

43802722681 is the 209291-st square number.

43802722681 is the 104646-th centered octagonal number.

It is an amenable number.

43802722681 is a deficient number, since it is larger than the sum of its proper divisors (2329339412).

43802722681 is an frugal number, since it uses more digits than its factorization.

43802722681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 43802722681 in words is "forty-three billion, eight hundred two million, seven hundred twenty-two thousand, six hundred eighty-one".