43809347412769 has 27 divisors (see below), whose sum is σ = 44774372539953. Its totient is φ = 42864974658792.

The previous prime is 43809347412739. The next prime is 43809347412811. The reversal of 43809347412769 is 96721474390834.

The square root of 43809347412769 is 6618863.

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

It is not a de Polignac number, because 43809347412769 - 2⁵ = 43809347412737 is a prime.

It is a super-2 number, since 2×43809347412769² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43809347412709) 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, 98892431862 + ... + 98892432304.

Almost surely, 2^{43809347412769} is an apocalyptic number.

43809347412769 is the 6618863-rd square number.

43809347412769 is the 3309432-nd centered octagonal number.

It is an amenable number.

43809347412769 is a deficient number, since it is larger than the sum of its proper divisors (965025127184).

43809347412769 is an frugal number, since it uses more digits than its factorization.

43809347412769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 67.

The spelling of 43809347412769 in words is "forty-three trillion, eight hundred nine billion, three hundred forty-seven million, four hundred twelve thousand, seven hundred sixty-nine".