138647746831 has 8 divisors (see below), whose sum is σ = 152087736528. Its totient is φ = 125347032000.

The previous prime is 138647746807. The next prime is 138647746877.

138647746831 is nontrivially palindromic in base 10.

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 138647746831 - 2¹¹ = 138647744783 is a prime.

It is a super-2 number, since 2×138647746831² (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 (138647746331) 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, 34816630 + ... + 34820611.

It is an arithmetic number, because the mean of its divisors is an integer number (19010967066).

Almost surely, 2^138647746831 is an apocalyptic number.

138647746831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138647746831 is a deficient number, since it is larger than the sum of its proper divisors (13439989697).

138647746831 is a wasteful number, since it uses less digits than its factorization.

138647746831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69637433.

The product of its digits is 16257024, while the sum is 58.

The spelling of 138647746831 in words is "one hundred thirty-eight billion, six hundred forty-seven million, seven hundred forty-six thousand, eight hundred thirty-one".