3213648396437 has 2 divisors, whose sum is σ = 3213648396438. Its totient is φ = 3213648396436.

The previous prime is 3213648396373. The next prime is 3213648396509. The reversal of 3213648396437 is 7346938463123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2920410984241 + 293237412196 = 1708921^2 + 541514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213648396437 - 2⁶ = 3213648396373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3213648396037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606824198218 + 1606824198219.

It is an arithmetic number, because the mean of its divisors is an integer number (1606824198219).

Almost surely, 2^{3213648396437} is an apocalyptic number.

It is an amenable number.

3213648396437 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213648396437 is an equidigital number, since it uses as much as digits as its factorization.

3213648396437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 59.

The spelling of 3213648396437 in words is "three trillion, two hundred thirteen billion, six hundred forty-eight million, three hundred ninety-six thousand, four hundred thirty-seven".