618417945 has 24 divisors (see below), whose sum is σ = 1072503432. Its totient is φ = 329644800.

The previous prime is 618417941. The next prime is 618418007. The reversal of 618417945 is 549714816.

618417945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 71419401 + 546998544 = 8451^2 + 23388^2 .

It is not a de Polignac number, because 618417945 - 2² = 618417941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 618417945.

It is not an unprimeable number, because it can be changed into a prime (618417941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157405 + ... + 161285.

It is an arithmetic number, because the mean of its divisors is an integer number (44687643).

Almost surely, 2^618417945 is an apocalyptic number.

It is an amenable number.

618417945 is a deficient number, since it is larger than the sum of its proper divisors (454085487).

618417945 is a wasteful number, since it uses less digits than its factorization.

618417945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7433 (or 7430 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 618417945 is about 24868.0104753074. The cubic root of 618417945 is about 851.9760002828.

The spelling of 618417945 in words is "six hundred eighteen million, four hundred seventeen thousand, nine hundred forty-five".