9661958343883 has 4 divisors (see below), whose sum is σ = 9712020304408. Its totient is φ = 9611896383360.

The previous prime is 9661958343881. The next prime is 9661958343899. The reversal of 9661958343883 is 3883438591669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9661958343883 - 2¹ = 9661958343881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9661958343881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25030979973 + ... + 25030980358.

It is an arithmetic number, because the mean of its divisors is an integer number (2428005076102).

Almost surely, 2^{9661958343883} is an apocalyptic number.

9661958343883 is a deficient number, since it is larger than the sum of its proper divisors (50061960525).

9661958343883 is a wasteful number, since it uses less digits than its factorization.

9661958343883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50061960524.

The product of its digits is 806215680, while the sum is 73.

The spelling of 9661958343883 in words is "nine trillion, six hundred sixty-one billion, nine hundred fifty-eight million, three hundred forty-three thousand, eight hundred eighty-three".