9621826657961 has 8 divisors (see below), whose sum is σ = 11017398897984. Its totient is φ = 8231510811600.

The previous prime is 9621826657951. The next prime is 9621826658023. The reversal of 9621826657961 is 1697566281269.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9621826657961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9621826657891 and 9621826657900.

It is not an unprimeable number, because it can be changed into a prime (9621826657951) 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, 1314094490 + ... + 1314101811.

It is an arithmetic number, because the mean of its divisors is an integer number (1377174862248).

Almost surely, 2^{9621826657961} is an apocalyptic number.

It is an amenable number.

9621826657961 is a deficient number, since it is larger than the sum of its proper divisors (1395572240023).

9621826657961 is a wasteful number, since it uses less digits than its factorization.

9621826657961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628196831.

The product of its digits is 117573120, while the sum is 68.

The spelling of 9621826657961 in words is "nine trillion, six hundred twenty-one billion, eight hundred twenty-six million, six hundred fifty-seven thousand, nine hundred sixty-one".