3213648396389 has 4 divisors (see below), whose sum is σ = 3214299860556. Its totient is φ = 3212996932224.

The previous prime is 3213648396373. The next prime is 3213648396437. The reversal of 3213648396389 is 9836938463123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1885719436225 + 1327928960164 = 1373215^2 + 1152358^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213648396389 - 2⁴ = 3213648396373 is a prime.

It is a super-2 number, since 2×3213648396389² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213648396319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325724684 + ... + 325734549.

It is an arithmetic number, because the mean of its divisors is an integer number (803574965139).

Almost surely, 2^{3213648396389} is an apocalyptic number.

It is an amenable number.

3213648396389 is a deficient number, since it is larger than the sum of its proper divisors (651464167).

3213648396389 is an equidigital number, since it uses as much as digits as its factorization.

3213648396389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651464166.

The product of its digits is 120932352, while the sum is 65.

The spelling of 3213648396389 in words is "three trillion, two hundred thirteen billion, six hundred forty-eight million, three hundred ninety-six thousand, three hundred eighty-nine".