961397322821 has 8 divisors (see below), whose sum is σ = 1037243751264. Its totient is φ = 885821292720.

The previous prime is 961397322793. The next prime is 961397322829. The reversal of 961397322821 is 128223793169.

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

It is not a de Polignac number, because 961397322821 - 2⁶ = 961397322757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961397322829) 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, 67592195 + ... + 67606416.

It is an arithmetic number, because the mean of its divisors is an integer number (129655468908).

Almost surely, 2^961397322821 is an apocalyptic number.

It is an amenable number.

961397322821 is a deficient number, since it is larger than the sum of its proper divisors (75846428443).

961397322821 is a wasteful number, since it uses less digits than its factorization.

961397322821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135199171.

The product of its digits is 1959552, while the sum is 53.

The spelling of 961397322821 in words is "nine hundred sixty-one billion, three hundred ninety-seven million, three hundred twenty-two thousand, eight hundred twenty-one".