138505243862 has 8 divisors (see below), whose sum is σ = 219978916776. Its totient is φ = 65178938272.

The previous prime is 138505243831. The next prime is 138505243867. The reversal of 138505243862 is 268342505831.

138505243862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138505243867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036841788 + ... + 2036841855.

It is an arithmetic number, because the mean of its divisors is an integer number (27497364597).

Almost surely, 2^138505243862 is an apocalyptic number.

138505243862 is a deficient number, since it is larger than the sum of its proper divisors (81473672914).

138505243862 is a wasteful number, since it uses less digits than its factorization.

138505243862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073683662.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 138505243862 in words is "one hundred thirty-eight billion, five hundred five million, two hundred forty-three thousand, eight hundred sixty-two".