618042438122 has 4 divisors (see below), whose sum is σ = 927063657186. Its totient is φ = 309021219060.

The previous prime is 618042438121. The next prime is 618042438127. The reversal of 618042438122 is 221834240816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 436089857641 + 181952580481 = 660371^2 + 426559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 618042438122.

It is not an unprimeable number, because it can be changed into a prime (618042438121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154510609529 + ... + 154510609532.

Almost surely, 2^618042438122 is an apocalyptic number.

618042438122 is a deficient number, since it is larger than the sum of its proper divisors (309021219064).

618042438122 is a wasteful number, since it uses less digits than its factorization.

618042438122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309021219063.

The product of its (nonzero) digits is 147456, while the sum is 41.

Adding to 618042438122 its reverse (221834240816), we get a palindrome (839876678938).

The spelling of 618042438122 in words is "six hundred eighteen billion, forty-two million, four hundred thirty-eight thousand, one hundred twenty-two".