9643138405693 has 8 divisors (see below), whose sum is σ = 10995795829368. Its totient is φ = 8377749202944.

The previous prime is 9643138405687. The next prime is 9643138405723. The reversal of 9643138405693 is 3965048313469.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 434474767609 + 9208663638084 = 659147^2 + 3034578^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9643138405693 - 2²¹ = 9643136308541 is a prime.

It is a super-2 number, since 2×9643138405693² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9643138405673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21817054996 + ... + 21817055437.

It is an arithmetic number, because the mean of its divisors is an integer number (1374474478671).

Almost surely, 2^{9643138405693} is an apocalyptic number.

It is an amenable number.

9643138405693 is a deficient number, since it is larger than the sum of its proper divisors (1352657423675).

9643138405693 is a wasteful number, since it uses less digits than its factorization.

9643138405693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43634110463.

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 9643138405693 in words is "nine trillion, six hundred forty-three billion, one hundred thirty-eight million, four hundred five thousand, six hundred ninety-three".