618541337704991 has 2 divisors, whose sum is σ = 618541337704992. Its totient is φ = 618541337704990.

The previous prime is 618541337704957. The next prime is 618541337705077. The reversal of 618541337704991 is 199407733145816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618541337704991 - 2¹⁰ = 618541337703967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618541337704921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309270668852495 + 309270668852496.

It is an arithmetic number, because the mean of its divisors is an integer number (309270668852496).

Almost surely, 2^{618541337704991} is an apocalyptic number.

618541337704991 is a deficient number, since it is larger than the sum of its proper divisors (1).

618541337704991 is an equidigital number, since it uses as much as digits as its factorization.

618541337704991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137168640, while the sum is 68.

The spelling of 618541337704991 in words is "six hundred eighteen trillion, five hundred forty-one billion, three hundred thirty-seven million, seven hundred four thousand, nine hundred ninety-one".