9970393553649 has 9 divisors (see below), whose sum is σ = 14401693260409. Its totient is φ = 6646922720580.

The previous prime is 9970393553647. The next prime is 9970393553669. The reversal of 9970393553649 is 9463553930799.

The square root of 9970393553649 is 3157593.

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

9970393553649 is a `hidden beast` number, since 9 + 9 + 7 + 0 + 3 + 9 + 3 + 553 + 64 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9970393553649 - 2¹ = 9970393553647 is a prime.

It is a super-2 number, since 2×9970393553649² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9970393553641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8946514 + ... + 9999044.

Almost surely, 2^{9970393553649} is an apocalyptic number.

9970393553649 is the 3157593-rd square number.

9970393553649 is the 1578797-th centered octagonal number.

It is an amenable number.

9970393553649 is a deficient number, since it is larger than the sum of its proper divisors (4431299706760).

9970393553649 is an frugal number, since it uses more digits than its factorization.

9970393553649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105068 (or 1052534 counting only the distinct ones).

The product of its (nonzero) digits is 744017400, while the sum is 72.

The spelling of 9970393553649 in words is "nine trillion, nine hundred seventy billion, three hundred ninety-three million, five hundred fifty-three thousand, six hundred forty-nine".