9997932645 has 24 divisors (see below), whose sum is σ = 18349148376. Its totient is φ = 5018569728.

The previous prime is 9997932617. The next prime is 9997932673. The reversal of 9997932645 is 5462397999.

9997932645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9997932617) and next prime (9997932673).

It can be written as a sum of positive squares in 4 ways, for example, as 5138309124 + 4859623521 = 71682^2 + 69711^2 .

It is not a de Polignac number, because 9997932645 - 2⁷ = 9997932517 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 6533832 + ... + 6535361.

It is an arithmetic number, because the mean of its divisors is an integer number (764547849).

Almost surely, 2^9997932645 is an apocalyptic number.

It is an amenable number.

9997932645 is a deficient number, since it is larger than the sum of its proper divisors (8351215731).

9997932645 is a wasteful number, since it uses less digits than its factorization.

9997932645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13069221 (or 13069218 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 63.

The square root of 9997932645 is about 99989.6626907002. The cubic root of 9997932645 is about 2154.2862137554.

The spelling of 9997932645 in words is "nine billion, nine hundred ninety-seven million, nine hundred thirty-two thousand, six hundred forty-five".