84844620961 has 9 divisors (see below), whose sum is σ = 85416132081. Its totient is φ = 84276914292.

The previous prime is 84844620911. The next prime is 84844620977. The reversal of 84844620961 is 16902644848.

The square root of 84844620961 is 291281.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 84844620961 - 2¹¹ = 84844618913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84844620899 and 84844620908.

It is not an unprimeable number, because it can be changed into a prime (84844620911) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47477910 + ... + 47479696.

Almost surely, 2^84844620961 is an apocalyptic number.

84844620961 is the 291281-st square number.

84844620961 is the 145641-st centered octagonal number.

It is an amenable number.

84844620961 is a deficient number, since it is larger than the sum of its proper divisors (571511120).

84844620961 is an frugal number, since it uses more digits than its factorization.

84844620961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 84844620961 in words is "eighty-four billion, eight hundred forty-four million, six hundred twenty thousand, nine hundred sixty-one".