43650361081 has 2 divisors, whose sum is σ = 43650361082. Its totient is φ = 43650361080.

The previous prime is 43650361063. The next prime is 43650361099. The reversal of 43650361081 is 18016305634.

It is a balanced prime because it is at equal distance from previous prime (43650361063) and next prime (43650361099).

It can be written as a sum of positive squares in only one way, i.e., 43564038400 + 86322681 = 208720^2 + 9291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43650361081 is a prime.

It is a super-2 number, since 2×43650361081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43650361081.

It is not a weakly prime, because it can be changed into another prime (43650361061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21825180540 + 21825180541.

It is an arithmetic number, because the mean of its divisors is an integer number (21825180541).

Almost surely, 2^43650361081 is an apocalyptic number.

It is an amenable number.

43650361081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43650361081 is an equidigital number, since it uses as much as digits as its factorization.

43650361081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 43650361081 in words is "forty-three billion, six hundred fifty million, three hundred sixty-one thousand, eighty-one".