43442886649 has 2 divisors, whose sum is σ = 43442886650. Its totient is φ = 43442886648.

The previous prime is 43442886587. The next prime is 43442886757. The reversal of 43442886649 is 94668824434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35798532025 + 7644354624 = 189205^2 + 87432^2 .

It is a cyclic number.

It is not a de Polignac number, because 43442886649 - 2¹¹ = 43442884601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43442886593 and 43442886602.

It is not a weakly prime, because it can be changed into another prime (43442886449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21721443324 + 21721443325.

It is an arithmetic number, because the mean of its divisors is an integer number (21721443325).

Almost surely, 2^43442886649 is an apocalyptic number.

It is an amenable number.

43442886649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43442886649 is an equidigital number, since it uses as much as digits as its factorization.

43442886649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31850496, while the sum is 58.

The spelling of 43442886649 in words is "forty-three billion, four hundred forty-two million, eight hundred eighty-six thousand, six hundred forty-nine".