32721872563 has 2 divisors, whose sum is σ = 32721872564. Its totient is φ = 32721872562.

The previous prime is 32721872501. The next prime is 32721872611. The reversal of 32721872563 is 36527812723.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32721872563 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (32721872863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16360936281 + 16360936282.

It is an arithmetic number, because the mean of its divisors is an integer number (16360936282).

Almost surely, 2^32721872563 is an apocalyptic number.

32721872563 is a deficient number, since it is larger than the sum of its proper divisors (1).

32721872563 is an equidigital number, since it uses as much as digits as its factorization.

32721872563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The spelling of 32721872563 in words is "thirty-two billion, seven hundred twenty-one million, eight hundred seventy-two thousand, five hundred sixty-three".