618467161 has 9 divisors (see below), whose sum is σ = 670051389. Its totient is φ = 570594336.

The previous prime is 618467147. The next prime is 618467167. The reversal of 618467161 is 161764816.

The square root of 618467161 is 24869.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 447561 + 618019600 = 669^2 + 24860^2 .

It is not a de Polignac number, because 618467161 - 2⁹ = 618466649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618467167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 322341 + ... + 324253.

Almost surely, 2^618467161 is an apocalyptic number.

618467161 is the 24869-th square number.

618467161 is the 12435-th centered octagonal number.

It is an amenable number.

618467161 is a deficient number, since it is larger than the sum of its proper divisors (51584228).

618467161 is an frugal number, since it uses more digits than its factorization.

618467161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852 (or 1926 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The cubic root of 618467161 is about 851.9986008228.

The spelling of 618467161 in words is "six hundred eighteen million, four hundred sixty-seven thousand, one hundred sixty-one".