43018607557 has 2 divisors, whose sum is σ = 43018607558. Its totient is φ = 43018607556.

The previous prime is 43018607539. The next prime is 43018607603. The reversal of 43018607557 is 75570681034.

It is an a-pointer prime, because the next prime (43018607603) can be obtained adding 43018607557 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40997745441 + 2020862116 = 202479^2 + 44954^2 .

It is a cyclic number.

It is not a de Polignac number, because 43018607557 - 2²³ = 43010218949 is a prime.

It is a super-2 number, since 2×43018607557² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43018604557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21509303778 + 21509303779.

It is an arithmetic number, because the mean of its divisors is an integer number (21509303779).

Almost surely, 2^43018607557 is an apocalyptic number.

It is an amenable number.

43018607557 is a deficient number, since it is larger than the sum of its proper divisors (1).

43018607557 is an equidigital number, since it uses as much as digits as its factorization.

43018607557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 43018607557 in words is "forty-three billion, eighteen million, six hundred seven thousand, five hundred fifty-seven".