43720116577 has 4 divisors (see below), whose sum is σ = 43720855216. Its totient is φ = 43719377940.

The previous prime is 43720116529. The next prime is 43720116599. The reversal of 43720116577 is 77561102734.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43720116577 - 2⁷ = 43720116449 is a prime.

It is a super-2 number, since 2×43720116577² (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 (43720116277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271983 + ... + 401764.

It is an arithmetic number, because the mean of its divisors is an integer number (10930213804).

Almost surely, 2^43720116577 is an apocalyptic number.

It is an amenable number.

43720116577 is a deficient number, since it is larger than the sum of its proper divisors (738639).

43720116577 is an equidigital number, since it uses as much as digits as its factorization.

43720116577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738638.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 43720116577 in words is "forty-three billion, seven hundred twenty million, one hundred sixteen thousand, five hundred seventy-seven".