32402439991 has 2 divisors, whose sum is σ = 32402439992. Its totient is φ = 32402439990.

The previous prime is 32402439989. The next prime is 32402440009. The reversal of 32402439991 is 19993420423.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32402439991 - 2¹ = 32402439989 is a prime.

Together with 32402439989, 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 (32402439911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16201219995 + 16201219996.

It is an arithmetic number, because the mean of its divisors is an integer number (16201219996).

Almost surely, 2^32402439991 is an apocalyptic number.

32402439991 is a deficient number, since it is larger than the sum of its proper divisors (1).

32402439991 is an equidigital number, since it uses as much as digits as its factorization.

32402439991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 32402439991 in words is "thirty-two billion, four hundred two million, four hundred thirty-nine thousand, nine hundred ninety-one".