43654669969 has 15 divisors (see below), whose sum is σ = 45093089483. Its totient is φ = 42262104864.

The previous prime is 43654669913. The next prime is 43654669973. The reversal of 43654669969 is 96996645634.

The square root of 43654669969 is 208937.

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

It can be written as a sum of positive squares in only one way, i.e., 769230225 + 42885439744 = 27735^2 + 207088^2 .

It is not a de Polignac number, because 43654669969 - 2¹⁹ = 43654145681 is a prime.

It is a super-2 number, since 2×43654669969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43654669909) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 386324457 + ... + 386324569.

Almost surely, 2^43654669969 is an apocalyptic number.

43654669969 is the 208937-th square number.

43654669969 is the 104469-th centered octagonal number.

It is an amenable number.

43654669969 is a deficient number, since it is larger than the sum of its proper divisors (1438419514).

43654669969 is an frugal number, since it uses more digits than its factorization.

43654669969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 156 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 67.

The spelling of 43654669969 in words is "forty-three billion, six hundred fifty-four million, six hundred sixty-nine thousand, nine hundred sixty-nine".