15438143244238 has 32 divisors (see below), whose sum is σ = 27283632415200. Its totient is φ = 6458982284160.

The previous prime is 15438143244229. The next prime is 15438143244239. The reversal of 15438143244238 is 83244234183451.

15438143244238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15438143244238² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15438143244239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77234745 + ... + 77434372.

It is an arithmetic number, because the mean of its divisors is an integer number (852613512975).

Almost surely, 2^{15438143244238} is an apocalyptic number.

15438143244238 is a deficient number, since it is larger than the sum of its proper divisors (11845489170962).

15438143244238 is a wasteful number, since it uses less digits than its factorization.

15438143244238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154669492.

The product of its digits is 8847360, while the sum is 52.

The spelling of 15438143244238 in words is "fifteen trillion, four hundred thirty-eight billion, one hundred forty-three million, two hundred forty-four thousand, two hundred thirty-eight".