4138616540881 has 3 divisors (see below), whose sum is σ = 4138618575241. Its totient is φ = 4138614506522.

The previous prime is 4138616540843. The next prime is 4138616540893. The reversal of 4138616540881 is 1880456168314.

The square root of 4138616540881 is 2034359.

It is a perfect power (a square), and thus also a powerful number.

4138616540881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4138616540881 - 2²⁵ = 4138582986449 is a prime.

It is a super-2 number, since 2×4138616540881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4138616540801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1017180 + ... + 3051538.

Almost surely, 2^{4138616540881} is an apocalyptic number.

4138616540881 is the 2034359-th square number.

4138616540881 is the 1017180-th centered octagonal number.

It is an amenable number.

4138616540881 is a deficient number, since it is larger than the sum of its proper divisors (2034360).

4138616540881 is an frugal number, since it uses more digits than its factorization.

4138616540881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068718 (or 2034359 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 4138616540881 in words is "four trillion, one hundred thirty-eight billion, six hundred sixteen million, five hundred forty thousand, eight hundred eighty-one".