321918413945 has 16 divisors (see below), whose sum is σ = 387517992960. Its totient is φ = 256724826624.

The previous prime is 321918413933. The next prime is 321918414017. The reversal of 321918413945 is 549314819123.

It is a cyclic number.

It is not a de Polignac number, because 321918413945 - 2²⁰ = 321917365369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321918413893 and 321918413902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3780104 + ... + 3864326.

It is an arithmetic number, because the mean of its divisors is an integer number (24219874560).

Almost surely, 2^321918413945 is an apocalyptic number.

It is an amenable number.

321918413945 is a deficient number, since it is larger than the sum of its proper divisors (65599579015).

321918413945 is a wasteful number, since it uses less digits than its factorization.

321918413945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86624.

The product of its digits is 933120, while the sum is 50.

The spelling of 321918413945 in words is "three hundred twenty-one billion, nine hundred eighteen million, four hundred thirteen thousand, nine hundred forty-five".