88044440821 has 2 divisors, whose sum is σ = 88044440822. Its totient is φ = 88044440820.

The previous prime is 88044440779. The next prime is 88044440851. The reversal of 88044440821 is 12804444088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49869142596 + 38175298225 = 223314^2 + 195385^2 .

It is a cyclic number.

It is not a de Polignac number, because 88044440821 - 2¹³ = 88044432629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88044440851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44022220410 + 44022220411.

It is an arithmetic number, because the mean of its divisors is an integer number (44022220411).

Almost surely, 2^88044440821 is an apocalyptic number.

It is an amenable number.

88044440821 is a deficient number, since it is larger than the sum of its proper divisors (1).

88044440821 is an equidigital number, since it uses as much as digits as its factorization.

88044440821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262144, while the sum is 43.

The spelling of 88044440821 in words is "eighty-eight billion, forty-four million, four hundred forty thousand, eight hundred twenty-one".