30969730640 has 20 divisors (see below), whose sum is σ = 72004623924. Its totient is φ = 12387892224.

The previous prime is 30969730601. The next prime is 30969730661. The reversal of 30969730640 is 4603796903.

It can be written as a sum of positive squares in 2 ways, for example, as 3428336704 + 27541393936 = 58552^2 + 165956^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193560737 + ... + 193560896.

Almost surely, 2^30969730640 is an apocalyptic number.

It is an amenable number.

30969730640 is an abundant number, since it is smaller than the sum of its proper divisors (41034893284).

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

30969730640 is a wasteful number, since it uses less digits than its factorization.

30969730640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387121646 (or 387121640 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 30969730640 in words is "thirty billion, nine hundred sixty-nine million, seven hundred thirty thousand, six hundred forty".