618254615161 has 2 divisors, whose sum is σ = 618254615162. Its totient is φ = 618254615160.

The previous prime is 618254615159. The next prime is 618254615183. The reversal of 618254615161 is 161516452816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612980950761 + 5273664400 = 782931^2 + 72620^2 .

It is a cyclic number.

It is not a de Polignac number, because 618254615161 - 2¹ = 618254615159 is a prime.

It is a super-2 number, since 2×618254615161² (a number of 24 digits) contains 22 as substring.

Together with 618254615159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (618254615261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309127307580 + 309127307581.

It is an arithmetic number, because the mean of its divisors is an integer number (309127307581).

Almost surely, 2^618254615161 is an apocalyptic number.

It is an amenable number.

618254615161 is a deficient number, since it is larger than the sum of its proper divisors (1).

618254615161 is an equidigital number, since it uses as much as digits as its factorization.

618254615161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The spelling of 618254615161 in words is "six hundred eighteen billion, two hundred fifty-four million, six hundred fifteen thousand, one hundred sixty-one".