40885048981991 has 2 divisors, whose sum is σ = 40885048981992. Its totient is φ = 40885048981990.

The previous prime is 40885048981967. The next prime is 40885048982027. The reversal of 40885048981991 is 19918984058804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40885048981991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40885048981901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20442524490995 + 20442524490996.

It is an arithmetic number, because the mean of its divisors is an integer number (20442524490996).

Almost surely, 2^{40885048981991} is an apocalyptic number.

40885048981991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40885048981991 is an equidigital number, since it uses as much as digits as its factorization.

40885048981991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238878720, while the sum is 74.

The spelling of 40885048981991 in words is "forty trillion, eight hundred eighty-five billion, forty-eight million, nine hundred eighty-one thousand, nine hundred ninety-one".