321108813738 has 48 divisors (see below), whose sum is σ = 697147031880. Its totient is φ = 106819335168.

The previous prime is 321108813703. The next prime is 321108813743. The reversal of 321108813738 is 837318801123.

It can be written as a sum of positive squares in 4 ways, for example, as 275187323889 + 45921489849 = 524583^2 + 214293^2 .

It is a super-2 number, since 2×321108813738² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 321108813693 and 321108813702.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25937806 + ... + 25950182.

Almost surely, 2^321108813738 is an apocalyptic number.

321108813738 is an abundant number, since it is smaller than the sum of its proper divisors (376038218142).

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

321108813738 is a wasteful number, since it uses less digits than its factorization.

321108813738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15191 (or 15188 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 321108813738 in words is "three hundred twenty-one billion, one hundred eight million, eight hundred thirteen thousand, seven hundred thirty-eight".