321856053489 has 12 divisors (see below), whose sum is σ = 464917469172. Its totient is φ = 214564111200.

The previous prime is 321856053481. The next prime is 321856053503. The reversal of 321856053489 is 984350658123.

321856053489 is a `hidden beast` number, since 3 + 21 + 8 + 5 + 6 + 0 + 534 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 125451972864 + 196404080625 = 354192^2 + 443175^2 .

It is not a de Polignac number, because 321856053489 - 2³ = 321856053481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321856053481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230242 + ... + 834699.

It is an arithmetic number, because the mean of its divisors is an integer number (38743122431).

Almost surely, 2^321856053489 is an apocalyptic number.

It is an amenable number.

321856053489 is a deficient number, since it is larger than the sum of its proper divisors (143061415683).

321856053489 is a wasteful number, since it uses less digits than its factorization.

321856053489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098528 (or 1098525 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 321856053489 in words is "three hundred twenty-one billion, eight hundred fifty-six million, fifty-three thousand, four hundred eighty-nine".