138018651543 has 8 divisors (see below), whose sum is σ = 204472076400. Its totient is φ = 92012434344.

The previous prime is 138018651527. The next prime is 138018651557. The reversal of 138018651543 is 345156810831.

138018651543 is a `hidden beast` number, since 1 + 3 + 80 + 18 + 6 + 515 + 43 = 666.

It is not a de Polignac number, because 138018651543 - 2⁴ = 138018651527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138018651503) 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, 2555900928 + ... + 2555900981.

It is an arithmetic number, because the mean of its divisors is an integer number (25559009550).

Almost surely, 2^138018651543 is an apocalyptic number.

138018651543 is a deficient number, since it is larger than the sum of its proper divisors (66453424857).

138018651543 is an equidigital number, since it uses as much as digits as its factorization.

138018651543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111801918 (or 5111801912 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 138018651543 in words is "one hundred thirty-eight billion, eighteen million, six hundred fifty-one thousand, five hundred forty-three".