40808443999 has 2 divisors, whose sum is σ = 40808444000. Its totient is φ = 40808443998.

The previous prime is 40808443997. The next prime is 40808444063. The reversal of 40808443999 is 99934480804.

40808443999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40808443999 - 2¹ = 40808443997 is a prime.

It is a super-2 number, since 2×40808443999² (a number of 22 digits) contains 22 as substring.

Together with 40808443997, 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 (40808443993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20404221999 + 20404222000.

It is an arithmetic number, because the mean of its divisors is an integer number (20404222000).

Almost surely, 2^40808443999 is an apocalyptic number.

40808443999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40808443999 is an equidigital number, since it uses as much as digits as its factorization.

40808443999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 40808443999 in words is "forty billion, eight hundred eight million, four hundred forty-three thousand, nine hundred ninety-nine".