618740045569 has 2 divisors, whose sum is σ = 618740045570. Its totient is φ = 618740045568.

The previous prime is 618740045563. The next prime is 618740045593. The reversal of 618740045569 is 965540047816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474875348544 + 143864697025 = 689112^2 + 379295^2 .

It is a cyclic number.

It is not a de Polignac number, because 618740045569 - 2¹⁷ = 618739914497 is a prime.

It is a super-2 number, since 2×618740045569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (618740045563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309370022784 + 309370022785.

It is an arithmetic number, because the mean of its divisors is an integer number (309370022785).

Almost surely, 2^618740045569 is an apocalyptic number.

It is an amenable number.

618740045569 is a deficient number, since it is larger than the sum of its proper divisors (1).

618740045569 is an equidigital number, since it uses as much as digits as its factorization.

618740045569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 618740045569 in words is "six hundred eighteen billion, seven hundred forty million, forty-five thousand, five hundred sixty-nine".