40889865941 has 2 divisors, whose sum is σ = 40889865942. Its totient is φ = 40889865940.

The previous prime is 40889865937. The next prime is 40889865943. The reversal of 40889865941 is 14956898804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34124803441 + 6765062500 = 184729^2 + 82250^2 .

It is a cyclic number.

It is not a de Polignac number, because 40889865941 - 2² = 40889865937 is a prime.

It is a super-2 number, since 2×40889865941² (a number of 22 digits) contains 22 as substring.

Together with 40889865943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40889865943) 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, 20444932970 + 20444932971.

It is an arithmetic number, because the mean of its divisors is an integer number (20444932971).

Almost surely, 2^40889865941 is an apocalyptic number.

It is an amenable number.

40889865941 is a deficient number, since it is larger than the sum of its proper divisors (1).

40889865941 is an equidigital number, since it uses as much as digits as its factorization.

40889865941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19906560, while the sum is 62.

The spelling of 40889865941 in words is "forty billion, eight hundred eighty-nine million, eight hundred sixty-five thousand, nine hundred forty-one".