9930394667520 has 120 divisors (see below), whose sum is σ = 34391749736916. Its totient is φ = 2648105238528.

The previous prime is 9930394667507. The next prime is 9930394667551. The reversal of 9930394667520 is 257664930399.

9930394667520 is a `hidden beast` number, since 9 + 9 + 3 + 0 + 3 + 9 + 46 + 67 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9047005214976 + 883389452544 = 3007824^2 + 939888^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×9930394667520² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215480317 + ... + 215526396.

Almost surely, 2^{9930394667520} is an apocalyptic number.

9930394667520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9930394667520 is an abundant number, since it is smaller than the sum of its proper divisors (24461355069396).

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

9930394667520 is a wasteful number, since it uses less digits than its factorization.

9930394667520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431006742 (or 431006723 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 63.

The spelling of 9930394667520 in words is "nine trillion, nine hundred thirty billion, three hundred ninety-four million, six hundred sixty-seven thousand, five hundred twenty".