618043537 has 2 divisors, whose sum is σ = 618043538. Its totient is φ = 618043536.

The previous prime is 618043513. The next prime is 618043583. The reversal of 618043537 is 735340816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617075281 + 968256 = 24841^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 618043537 - 2¹⁵ = 618010769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 618043496 and 618043505.

It is not a weakly prime, because it can be changed into another prime (618043037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309021768 + 309021769.

It is an arithmetic number, because the mean of its divisors is an integer number (309021769).

Almost surely, 2^618043537 is an apocalyptic number.

It is an amenable number.

618043537 is a deficient number, since it is larger than the sum of its proper divisors (1).

618043537 is an equidigital number, since it uses as much as digits as its factorization.

618043537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 618043537 is about 24860.4814313802. The cubic root of 618043537 is about 851.8040286525.

It can be divided in two parts, 61804 and 3537, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 618043537 in words is "six hundred eighteen million, forty-three thousand, five hundred thirty-seven".