44040037991 has 2 divisors, whose sum is σ = 44040037992. Its totient is φ = 44040037990.

The previous prime is 44040037969. The next prime is 44040038023. The reversal of 44040037991 is 19973004044.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44040037991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44040097991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22020018995 + 22020018996.

It is an arithmetic number, because the mean of its divisors is an integer number (22020018996).

Almost surely, 2^44040037991 is an apocalyptic number.

44040037991 is a deficient number, since it is larger than the sum of its proper divisors (1).

44040037991 is an equidigital number, since it uses as much as digits as its factorization.

44040037991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 44040037991 in words is "forty-four billion, forty million, thirty-seven thousand, nine hundred ninety-one".