32447216257 has 2 divisors, whose sum is σ = 32447216258. Its totient is φ = 32447216256.

The previous prime is 32447216201. The next prime is 32447216281. The reversal of 32447216257 is 75261274423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31469340816 + 977875441 = 177396^2 + 31271^2 .

It is a cyclic number.

It is not a de Polignac number, because 32447216257 - 2⁷ = 32447216129 is a prime.

It is not a weakly prime, because it can be changed into another prime (32447216657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16223608128 + 16223608129.

It is an arithmetic number, because the mean of its divisors is an integer number (16223608129).

Almost surely, 2^32447216257 is an apocalyptic number.

It is an amenable number.

32447216257 is a deficient number, since it is larger than the sum of its proper divisors (1).

32447216257 is an equidigital number, since it uses as much as digits as its factorization.

32447216257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 43.

The spelling of 32447216257 in words is "thirty-two billion, four hundred forty-seven million, two hundred sixteen thousand, two hundred fifty-seven".