44021893561 has 16 divisors (see below), whose sum is σ = 45707880960. Its totient is φ = 42366055680.

The previous prime is 44021893523. The next prime is 44021893577. The reversal of 44021893561 is 16539812044.

It is a cyclic number.

It is not a de Polignac number, because 44021893561 - 2⁹ = 44021893049 is a prime.

It is a super-2 number, since 2×44021893561² (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 (44021893061) 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, 3955741 + ... + 3966853.

It is an arithmetic number, because the mean of its divisors is an integer number (2856742560).

Almost surely, 2^44021893561 is an apocalyptic number.

44021893561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44021893561 is a deficient number, since it is larger than the sum of its proper divisors (1685987399).

44021893561 is a wasteful number, since it uses less digits than its factorization.

44021893561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12456.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 44021893561 in words is "forty-four billion, twenty-one million, eight hundred ninety-three thousand, five hundred sixty-one".