32378387891 has 2 divisors, whose sum is σ = 32378387892. Its totient is φ = 32378387890.

The previous prime is 32378387849. The next prime is 32378387917. The reversal of 32378387891 is 19878387323.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 32378387891 - 2⁶ = 32378387827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32378387891.

It is not a weakly prime, because it can be changed into another prime (32378387791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16189193945 + 16189193946.

It is an arithmetic number, because the mean of its divisors is an integer number (16189193946).

Almost surely, 2^32378387891 is an apocalyptic number.

32378387891 is a deficient number, since it is larger than the sum of its proper divisors (1).

32378387891 is an equidigital number, since it uses as much as digits as its factorization.

32378387891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 59.

The spelling of 32378387891 in words is "thirty-two billion, three hundred seventy-eight million, three hundred eighty-seven thousand, eight hundred ninety-one".