30609812738 has 18 divisors (see below), whose sum is σ = 46225967067. Its totient is φ = 15201853440.

The previous prime is 30609812713. The next prime is 30609812741. The reversal of 30609812738 is 83721890603.

It can be written as a sum of positive squares in 5 ways, for example, as 21189751489 + 9420061249 = 145567^2 + 97057^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=123713.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30609812692 and 30609812701.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47752898 + ... + 47753538.

Almost surely, 2^30609812738 is an apocalyptic number.

30609812738 is a deficient number, since it is larger than the sum of its proper divisors (15616154329).

30609812738 is an frugal number, since it uses more digits than its factorization.

30609812738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 30609812738 in words is "thirty billion, six hundred nine million, eight hundred twelve thousand, seven hundred thirty-eight".