138240969042831 has 8 divisors (see below), whose sum is σ = 189302948599344. Its totient is φ = 89669817757440.

The previous prime is 138240969042821. The next prime is 138240969042877.

It is a happy number.

138240969042831 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 138240969042831 - 2¹⁰ = 138240969041807 is a prime.

It is a super-2 number, since 2×138240969042831² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138240969042821) 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, 622707067650 + ... + 622707067871.

It is an arithmetic number, because the mean of its divisors is an integer number (23662868574918).

Almost surely, 2^{138240969042831} is an apocalyptic number.

138240969042831 is a deficient number, since it is larger than the sum of its proper divisors (51061979556513).

138240969042831 is a wasteful number, since it uses less digits than its factorization.

138240969042831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245414135561.

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 138240969042831 in words is "one hundred thirty-eight trillion, two hundred forty billion, nine hundred sixty-nine million, forty-two thousand, eight hundred thirty-one".