44544086991 has 12 divisors (see below), whose sum is σ = 66080417832. Its totient is φ = 28893461616.

The previous prime is 44544086981. The next prime is 44544087013. The reversal of 44544086991 is 19968044544.

44544086991 is a `hidden beast` number, since 4 + 4 + 544 + 0 + 8 + 6 + 9 + 91 = 666.

It is not a de Polignac number, because 44544086991 - 2⁹ = 44544086479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44544086981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66882681 + ... + 66883346.

It is an arithmetic number, because the mean of its divisors is an integer number (5506701486).

Almost surely, 2^44544086991 is an apocalyptic number.

44544086991 is a deficient number, since it is larger than the sum of its proper divisors (21536330841).

44544086991 is a wasteful number, since it uses less digits than its factorization.

44544086991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133766070 (or 133766067 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 44544086991 in words is "forty-four billion, five hundred forty-four million, eighty-six thousand, nine hundred ninety-one".