43963888295681 has 2 divisors, whose sum is σ = 43963888295682. Its totient is φ = 43963888295680.

The previous prime is 43963888295653. The next prime is 43963888295729. The reversal of 43963888295681 is 18659288836934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26588254704400 + 17375633591281 = 5156380^2 + 4168409^2 .

It is a cyclic number.

It is not a de Polignac number, because 43963888295681 - 2⁶ = 43963888295617 is a prime.

It is a super-2 number, since 2×43963888295681² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43963888295596 and 43963888295605.

It is not a weakly prime, because it can be changed into another prime (43963888295581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21981944147840 + 21981944147841.

It is an arithmetic number, because the mean of its divisors is an integer number (21981944147841).

Almost surely, 2^{43963888295681} is an apocalyptic number.

It is an amenable number.

43963888295681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43963888295681 is an equidigital number, since it uses as much as digits as its factorization.

43963888295681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4299816960, while the sum is 80.

The spelling of 43963888295681 in words is "forty-three trillion, nine hundred sixty-three billion, eight hundred eighty-eight million, two hundred ninety-five thousand, six hundred eighty-one".