1444804781418 has 24 divisors (see below), whose sum is σ = 3314552146308. Its totient is φ = 453272088192.

The previous prime is 1444804781411. The next prime is 1444804781477. The reversal of 1444804781418 is 8141874084441.

1444804781418 is a `hidden beast` number, since 1 + 4 + 4 + 480 + 47 + 81 + 41 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1369946179809 + 74858601609 = 1170447^2 + 273603^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1444804781411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2360791821 + ... + 2360792432.

Almost surely, 2^{1444804781418} is an apocalyptic number.

1444804781418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1444804781418 is an abundant number, since it is smaller than the sum of its proper divisors (1869747364890).

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

1444804781418 is a wasteful number, since it uses less digits than its factorization.

1444804781418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721584278 (or 4721584275 counting only the distinct ones).

The product of its (nonzero) digits is 3670016, while the sum is 54.

It can be divided in two parts, 1444804 and 781418, that added together give a palindrome (2226222).

The spelling of 1444804781418 in words is "one trillion, four hundred forty-four billion, eight hundred four million, seven hundred eighty-one thousand, four hundred eighteen".