1228382581418 has 16 divisors (see below), whose sum is σ = 1848144970824. Its totient is φ = 612336499200.

The previous prime is 1228382581379. The next prime is 1228382581463. The reversal of 1228382581418 is 8141852838221.

It can be written as a sum of positive squares in 4 ways, for example, as 487032307129 + 741350274289 = 697877^2 + 861017^2 .

It is a super-2 number, since 2×1228382581418² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1228382581418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538196 + ... + 1657232.

Almost surely, 2^{1228382581418} is an apocalyptic number.

1228382581418 is a deficient number, since it is larger than the sum of its proper divisors (619762389406).

1228382581418 is a wasteful number, since it uses less digits than its factorization.

1228382581418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120697.

The product of its digits is 1966080, while the sum is 53.

The spelling of 1228382581418 in words is "one trillion, two hundred twenty-eight billion, three hundred eighty-two million, five hundred eighty-one thousand, four hundred eighteen".