321204130413440 has 64 divisors (see below), whose sum is σ = 769756078746000. Its totient is φ = 128167515992064.

The previous prime is 321204130413427. The next prime is 321204130413457. The reversal of 321204130413440 is 44314031402123.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 321204130413397 and 321204130413406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613285250 + ... + 613808769.

Almost surely, 2^{321204130413440} is an apocalyptic number.

It is an amenable number.

321204130413440 is an abundant number, since it is smaller than the sum of its proper divisors (448551948332560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321204130413440 is a wasteful number, since it uses less digits than its factorization.

321204130413440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227094447 (or 1227094435 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 321204130413440 its reverse (44314031402123), we get a palindrome (365518161815563).

The spelling of 321204130413440 in words is "three hundred twenty-one trillion, two hundred four billion, one hundred thirty million, four hundred thirteen thousand, four hundred forty".