618938145 has 64 divisors (see below), whose sum is σ = 1264896000. Its totient is φ = 281285568.

The previous prime is 618938141. The next prime is 618938179. The reversal of 618938145 is 541839816.

It is not a de Polignac number, because 618938145 - 2² = 618938141 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 618938145.

It is not an unprimeable number, because it can be changed into a prime (618938141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167326 + ... + 170984.

It is an arithmetic number, because the mean of its divisors is an integer number (19764000).

Almost surely, 2^618938145 is an apocalyptic number.

It is an amenable number.

618938145 is an abundant number, since it is smaller than the sum of its proper divisors (645957855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618938145 is a wasteful number, since it uses less digits than its factorization.

618938145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859 (or 3853 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 618938145 is about 24878.4674970144. The cubic root of 618938145 is about 852.2148213516.

The spelling of 618938145 in words is "six hundred eighteen million, nine hundred thirty-eight thousand, one hundred forty-five".