9993646980529 has 3 divisors (see below), whose sum is σ = 9993650141803. Its totient is φ = 9993643819256.

The previous prime is 9993646980521. The next prime is 9993646980553. The reversal of 9993646980529 is 9250896463999.

The square root of 9993646980529 is 3161273.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4170846330225 + 5822800650304 = 2042265^2 + 2413048^2 .

It is not a de Polignac number, because 9993646980529 - 2³ = 9993646980521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9993646980521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1580637 + ... + 4741909.

Almost surely, 2^{9993646980529} is an apocalyptic number.

9993646980529 is the 3161273-rd square number.

9993646980529 is the 1580637-th centered octagonal number.

It is an amenable number.

9993646980529 is a deficient number, since it is larger than the sum of its proper divisors (3161274).

9993646980529 is an frugal number, since it uses more digits than its factorization.

9993646980529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322546 (or 3161273 counting only the distinct ones).

The product of its (nonzero) digits is 2040733440, while the sum is 79.

The spelling of 9993646980529 in words is "nine trillion, nine hundred ninety-three billion, six hundred forty-six million, nine hundred eighty thousand, five hundred twenty-nine".