444440087081 has 4 divisors (see below), whose sum is σ = 463763569152. Its totient is φ = 425116605012.

The previous prime is 444440087071. The next prime is 444440087101. The reversal of 444440087081 is 180780044444.

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 444440087081 - 2¹⁸ = 444439824937 is a prime.

It is a super-2 number, since 2×444440087081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (444440087041) 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, 9661741001 + ... + 9661741046.

It is an arithmetic number, because the mean of its divisors is an integer number (115940892288).

Almost surely, 2^444440087081 is an apocalyptic number.

It is an amenable number.

444440087081 is a deficient number, since it is larger than the sum of its proper divisors (19323482071).

444440087081 is a wasteful number, since it uses less digits than its factorization.

444440087081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19323482070.

The product of its (nonzero) digits is 458752, while the sum is 44.

The spelling of 444440087081 in words is "four hundred forty-four billion, four hundred forty million, eighty-seven thousand, eighty-one".