43477775749 has 2 divisors, whose sum is σ = 43477775750. Its totient is φ = 43477775748.

The previous prime is 43477775741. The next prime is 43477775813. The reversal of 43477775749 is 94757777434.

It is an a-pointer prime, because the next prime (43477775813) can be obtained adding 43477775749 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36703662724 + 6774113025 = 191582^2 + 82305^2 .

It is a cyclic number.

It is not a de Polignac number, because 43477775749 - 2³ = 43477775741 is a prime.

It is a super-3 number, since 3×43477775749³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43477775741) 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, 21738887874 + 21738887875.

It is an arithmetic number, because the mean of its divisors is an integer number (21738887875).

Almost surely, 2^43477775749 is an apocalyptic number.

It is an amenable number.

43477775749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43477775749 is an equidigital number, since it uses as much as digits as its factorization.

43477775749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145212480, while the sum is 64.

The spelling of 43477775749 in words is "forty-three billion, four hundred seventy-seven million, seven hundred seventy-five thousand, seven hundred forty-nine".