9223961780621 has 4 divisors (see below), whose sum is σ = 10541670606432. Its totient is φ = 7906252954812.

The previous prime is 9223961780609. The next prime is 9223961780629. The reversal of 9223961780621 is 1260871693229.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9223961780621 - 2⁴² = 4825915269517 is a prime.

It is a super-2 number, since 2×9223961780621² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9223961780629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658854412895 + ... + 658854412908.

It is an arithmetic number, because the mean of its divisors is an integer number (2635417651608).

Almost surely, 2^{9223961780621} is an apocalyptic number.

It is an amenable number.

9223961780621 is a deficient number, since it is larger than the sum of its proper divisors (1317708825811).

9223961780621 is a wasteful number, since it uses less digits than its factorization.

9223961780621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317708825810.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 9223961780621 in words is "nine trillion, two hundred twenty-three billion, nine hundred sixty-one million, seven hundred eighty thousand, six hundred twenty-one".