43488663893749 has 2 divisors, whose sum is σ = 43488663893750. Its totient is φ = 43488663893748.

The previous prime is 43488663893713. The next prime is 43488663893771. The reversal of 43488663893749 is 94739836688434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24188396148900 + 19300267744849 = 4918170^2 + 4393207^2 .

It is a cyclic number.

It is not a de Polignac number, because 43488663893749 - 2¹⁵ = 43488663860981 is a prime.

It is a super-2 number, since 2×43488663893749² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43488663899749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21744331946874 + 21744331946875.

It is an arithmetic number, because the mean of its divisors is an integer number (21744331946875).

Almost surely, 2^{43488663893749} is an apocalyptic number.

It is an amenable number.

43488663893749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43488663893749 is an equidigital number, since it uses as much as digits as its factorization.

43488663893749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18059231232, while the sum is 82.

The spelling of 43488663893749 in words is "forty-three trillion, four hundred eighty-eight billion, six hundred sixty-three million, eight hundred ninety-three thousand, seven hundred forty-nine".