138849287823 has 12 divisors (see below), whose sum is σ = 200573901528. Its totient is φ = 92559813840.

The previous prime is 138849287809. The next prime is 138849287831. The reversal of 138849287823 is 328782948831.

138849287823 is a `hidden beast` number, since 138 + 8 + 492 + 8 + 7 + 8 + 2 + 3 = 666.

It is not a de Polignac number, because 138849287823 - 2²⁵ = 138815733391 is a prime.

It is a super-3 number, since 3×138849287823³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138849287893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391693 + ... + 656598.

It is an arithmetic number, because the mean of its divisors is an integer number (16714491794).

Almost surely, 2^138849287823 is an apocalyptic number.

138849287823 is a deficient number, since it is larger than the sum of its proper divisors (61724613705).

138849287823 is a wasteful number, since it uses less digits than its factorization.

138849287823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063014 (or 1063011 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 138849287823 in words is "one hundred thirty-eight billion, eight hundred forty-nine million, two hundred eighty-seven thousand, eight hundred twenty-three".