44546786821 has 2 divisors, whose sum is σ = 44546786822. Its totient is φ = 44546786820.

The previous prime is 44546786797. The next prime is 44546786833. The reversal of 44546786821 is 12868764544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25451416225 + 19095370596 = 159535^2 + 138186^2 .

It is a cyclic number.

It is not a de Polignac number, because 44546786821 - 2⁷ = 44546786693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44546781821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22273393410 + 22273393411.

It is an arithmetic number, because the mean of its divisors is an integer number (22273393411).

Almost surely, 2^44546786821 is an apocalyptic number.

It is an amenable number.

44546786821 is a deficient number, since it is larger than the sum of its proper divisors (1).

44546786821 is an equidigital number, since it uses as much as digits as its factorization.

44546786821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10321920, while the sum is 55.

The spelling of 44546786821 in words is "forty-four billion, five hundred forty-six million, seven hundred eighty-six thousand, eight hundred twenty-one".