8844449977421 has 2 divisors, whose sum is σ = 8844449977422. Its totient is φ = 8844449977420.

The previous prime is 8844449977399. The next prime is 8844449977513. The reversal of 8844449977421 is 1247799444488.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6653046422500 + 2191403554921 = 2579350^2 + 1480339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8844449977421 is a prime.

It is a super-2 number, since 2×8844449977421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8844449977021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4422224988710 + 4422224988711.

It is an arithmetic number, because the mean of its divisors is an integer number (4422224988711).

Almost surely, 2^{8844449977421} is an apocalyptic number.

It is an amenable number.

8844449977421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8844449977421 is an equidigital number, since it uses as much as digits as its factorization.

8844449977421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 520224768, while the sum is 71.

The spelling of 8844449977421 in words is "eight trillion, eight hundred forty-four billion, four hundred forty-nine million, nine hundred seventy-seven thousand, four hundred twenty-one".