9913621857769 has 8 divisors (see below), whose sum is σ = 11329898545728. Its totient is φ = 8497356418320.

The previous prime is 9913621857749. The next prime is 9913621857773. The reversal of 9913621857769 is 9677581263199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-9913621857769 is a prime.

It is a super-2 number, since 2×9913621857769² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9913621857709) 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 7 ways as a sum of consecutive naturals, for example, 830467 + ... + 4529560.

It is an arithmetic number, because the mean of its divisors is an integer number (1416237318216).

Almost surely, 2^{9913621857769} is an apocalyptic number.

It is an amenable number.

9913621857769 is a deficient number, since it is larger than the sum of its proper divisors (1416276687959).

9913621857769 is a wasteful number, since it uses less digits than its factorization.

9913621857769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624255.

The product of its digits is 308629440, while the sum is 73.

The spelling of 9913621857769 in words is "nine trillion, nine hundred thirteen billion, six hundred twenty-one million, eight hundred fifty-seven thousand, seven hundred sixty-nine".