32497728821 has 2 divisors, whose sum is σ = 32497728822. Its totient is φ = 32497728820.

The previous prime is 32497728743. The next prime is 32497728829. The reversal of 32497728821 is 12882779423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21693165796 + 10804563025 = 147286^2 + 103945^2 .

It is a cyclic number.

It is not a de Polignac number, because 32497728821 - 2²⁶ = 32430619957 is a prime.

It is a super-2 number, since 2×32497728821² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32497728829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16248864410 + 16248864411.

It is an arithmetic number, because the mean of its divisors is an integer number (16248864411).

Almost surely, 2^32497728821 is an apocalyptic number.

It is an amenable number.

32497728821 is a deficient number, since it is larger than the sum of its proper divisors (1).

32497728821 is an equidigital number, since it uses as much as digits as its factorization.

32497728821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 53.

The spelling of 32497728821 in words is "thirty-two billion, four hundred ninety-seven million, seven hundred twenty-eight thousand, eight hundred twenty-one".