32440219991 has 2 divisors, whose sum is σ = 32440219992. Its totient is φ = 32440219990.

The previous prime is 32440219963. The next prime is 32440220047. The reversal of 32440219991 is 19991204423.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32440219991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32440219901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16220109995 + 16220109996.

It is an arithmetic number, because the mean of its divisors is an integer number (16220109996).

Almost surely, 2^32440219991 is an apocalyptic number.

32440219991 is a deficient number, since it is larger than the sum of its proper divisors (1).

32440219991 is an equidigital number, since it uses as much as digits as its factorization.

32440219991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 32440219991 in words is "thirty-two billion, four hundred forty million, two hundred nineteen thousand, nine hundred ninety-one".