44071800721 has 16 divisors (see below), whose sum is σ = 51571555840. Its totient is φ = 37297272960.

The previous prime is 44071800719. The next prime is 44071800737. The reversal of 44071800721 is 12700817044.

It is a cyclic number.

It is not a de Polignac number, because 44071800721 - 2¹ = 44071800719 is a prime.

It is a super-2 number, since 2×44071800721² (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 (44071800761) 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, 2870220 + ... + 2885533.

It is an arithmetic number, because the mean of its divisors is an integer number (3223222240).

Almost surely, 2^44071800721 is an apocalyptic number.

It is an amenable number.

44071800721 is a deficient number, since it is larger than the sum of its proper divisors (7499755119).

44071800721 is a wasteful number, since it uses less digits than its factorization.

44071800721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755816.

The product of its (nonzero) digits is 12544, while the sum is 34.

The spelling of 44071800721 in words is "forty-four billion, seventy-one million, eight hundred thousand, seven hundred twenty-one".