618541337705077 has 2 divisors, whose sum is σ = 618541337705078. Its totient is φ = 618541337705076.

The previous prime is 618541337704991. The next prime is 618541337705171. The reversal of 618541337705077 is 770507733145816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438847151845041 + 179694185860036 = 20948679^2 + 13405006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618541337705077 is a prime.

It is a super-2 number, since 2×618541337705077² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618541337705777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309270668852538 + 309270668852539.

It is an arithmetic number, because the mean of its divisors is an integer number (309270668852539).

Almost surely, 2^{618541337705077} is an apocalyptic number.

It is an amenable number.

618541337705077 is a deficient number, since it is larger than the sum of its proper divisors (1).

618541337705077 is an equidigital number, since it uses as much as digits as its factorization.

618541337705077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103723200, while the sum is 64.

The spelling of 618541337705077 in words is "six hundred eighteen trillion, five hundred forty-one billion, three hundred thirty-seven million, seven hundred five thousand, seventy-seven".