138345543831 has 8 divisors (see below), whose sum is σ = 201229881984. Its totient is φ = 83845784120.

The previous prime is 138345543827. The next prime is 138345543841.

138345543831 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 138345543831 - 2² = 138345543827 is a prime.

It is a super-2 number, since 2×138345543831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138345543841) 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, 2096144571 + ... + 2096144636.

It is an arithmetic number, because the mean of its divisors is an integer number (25153735248).

Almost surely, 2^138345543831 is an apocalyptic number.

138345543831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138345543831 is a deficient number, since it is larger than the sum of its proper divisors (62884338153).

138345543831 is a wasteful number, since it uses less digits than its factorization.

138345543831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192289221.

The product of its digits is 2073600, while the sum is 48.

The spelling of 138345543831 in words is "one hundred thirty-eight billion, three hundred forty-five million, five hundred forty-three thousand, eight hundred thirty-one".