321340043310400 has 84 divisors (see below), whose sum is σ = 790707758030140. Its totient is φ = 128534324428800.

The previous prime is 321340043310389. The next prime is 321340043310421. The reversal of 321340043310400 is 4013340043123.

It can be written as a sum of positive squares in 6 ways, for example, as 60460950640896 + 260879092669504 = 7775664^2 + 16151752^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123902146 + ... + 126469054.

Almost surely, 2^{321340043310400} is an apocalyptic number.

It is an amenable number.

321340043310400 is an abundant number, since it is smaller than the sum of its proper divisors (469367714719740).

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

321340043310400 is a wasteful number, since it uses less digits than its factorization.

321340043310400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645172 (or 2645157 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 321340043310400 its reverse (4013340043123), we get a palindrome (325353383353523).

The spelling of 321340043310400 in words is "three hundred twenty-one trillion, three hundred forty billion, forty-three million, three hundred ten thousand, four hundred".