32400329681 has 2 divisors, whose sum is σ = 32400329682. Its totient is φ = 32400329680.

The previous prime is 32400329669. The next prime is 32400329711. The reversal of 32400329681 is 18692300423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17314349056 + 15085980625 = 131584^2 + 122825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32400329681 is a prime.

It is a super-2 number, since 2×32400329681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32400329881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200164840 + 16200164841.

It is an arithmetic number, because the mean of its divisors is an integer number (16200164841).

Almost surely, 2^32400329681 is an apocalyptic number.

It is an amenable number.

32400329681 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400329681 is an equidigital number, since it uses as much as digits as its factorization.

32400329681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 32400329681 in words is "thirty-two billion, four hundred million, three hundred twenty-nine thousand, six hundred eighty-one".