1355440144838 has 16 divisors (see below), whose sum is σ = 2190172869360. Its totient is φ = 625411841376.

The previous prime is 1355440144837. The next prime is 1355440144847. The reversal of 1355440144838 is 8384410445531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355440144837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7235648 + ... + 7420611.

It is an arithmetic number, because the mean of its divisors is an integer number (136885804335).

Almost surely, 2^{1355440144838} is an apocalyptic number.

1355440144838 is a deficient number, since it is larger than the sum of its proper divisors (834732724522).

1355440144838 is a wasteful number, since it uses less digits than its factorization.

1355440144838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14659831.

The product of its (nonzero) digits is 3686400, while the sum is 50.

The spelling of 1355440144838 in words is "one trillion, three hundred fifty-five billion, four hundred forty million, one hundred forty-four thousand, eight hundred thirty-eight".