43161516460721 has 16 divisors (see below), whose sum is σ = 43511100671808. Its totient is φ = 42812242636800.

The previous prime is 43161516460717. The next prime is 43161516460739. The reversal of 43161516460721 is 12706461516134.

It is a cyclic number.

It is not a de Polignac number, because 43161516460721 - 2² = 43161516460717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43161516460771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4025129066 + ... + 4025139788.

It is an arithmetic number, because the mean of its divisors is an integer number (2719443791988).

Almost surely, 2^{43161516460721} is an apocalyptic number.

It is an amenable number.

43161516460721 is a deficient number, since it is larger than the sum of its proper divisors (349584211087).

43161516460721 is a wasteful number, since it uses less digits than its factorization.

43161516460721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22192.

The product of its (nonzero) digits is 725760, while the sum is 47.

Adding to 43161516460721 its reverse (12706461516134), we get a palindrome (55867977976855).

The spelling of 43161516460721 in words is "forty-three trillion, one hundred sixty-one billion, five hundred sixteen million, four hundred sixty thousand, seven hundred twenty-one".