138763877639 has 8 divisors (see below), whose sum is σ = 147485370240. Its totient is φ = 130184198136.

The previous prime is 138763877597. The next prime is 138763877669. The reversal of 138763877639 is 936778367831.

138763877639 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 cyclic number.

It is not a de Polignac number, because 138763877639 - 2¹² = 138763873543 is a prime.

It is a super-2 number, since 2×138763877639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138763877669) 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 7 ways as a sum of consecutive naturals, for example, 35451257 + ... + 35455170.

It is an arithmetic number, because the mean of its divisors is an integer number (18435671280).

Almost surely, 2^138763877639 is an apocalyptic number.

138763877639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

138763877639 is a deficient number, since it is larger than the sum of its proper divisors (8721492601).

138763877639 is a wasteful number, since it uses less digits than its factorization.

138763877639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70906549.

The product of its digits is 192036096, while the sum is 68.

The spelling of 138763877639 in words is "one hundred thirty-eight billion, seven hundred sixty-three million, eight hundred seventy-seven thousand, six hundred thirty-nine".