40889865943 has 2 divisors, whose sum is σ = 40889865944. Its totient is φ = 40889865942.

The previous prime is 40889865941. The next prime is 40889865959. The reversal of 40889865943 is 34956898804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40889865943 - 2¹ = 40889865941 is a prime.

It is a super-2 number, since 2×40889865943² (a number of 22 digits) contains 22 as substring.

Together with 40889865941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40889865941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20444932971 + 20444932972.

It is an arithmetic number, because the mean of its divisors is an integer number (20444932972).

Almost surely, 2^40889865943 is an apocalyptic number.

40889865943 is a deficient number, since it is larger than the sum of its proper divisors (1).

40889865943 is an equidigital number, since it uses as much as digits as its factorization.

40889865943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59719680, while the sum is 64.

The spelling of 40889865943 in words is "forty billion, eight hundred eighty-nine million, eight hundred sixty-five thousand, nine hundred forty-three".