32720718257 has 2 divisors, whose sum is σ = 32720718258. Its totient is φ = 32720718256.

The previous prime is 32720718221. The next prime is 32720718263. The reversal of 32720718257 is 75281702723.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28989829696 + 3730888561 = 170264^2 + 61081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32720718257 is a prime.

It is not a weakly prime, because it can be changed into another prime (32720718287) 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, 16360359128 + 16360359129.

It is an arithmetic number, because the mean of its divisors is an integer number (16360359129).

Almost surely, 2^32720718257 is an apocalyptic number.

It is an amenable number.

32720718257 is a deficient number, since it is larger than the sum of its proper divisors (1).

32720718257 is an equidigital number, since it uses as much as digits as its factorization.

32720718257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 329280, while the sum is 44.

The spelling of 32720718257 in words is "thirty-two billion, seven hundred twenty million, seven hundred eighteen thousand, two hundred fifty-seven".