138876357717 has 48 divisors (see below), whose sum is σ = 212265930240. Its totient is φ = 87352473600.

The previous prime is 138876357713. The next prime is 138876357731. The reversal of 138876357717 is 717753678831.

138876357717 is a `hidden beast` number, since 138 + 87 + 6 + 357 + 71 + 7 = 666.

It is not a de Polignac number, because 138876357717 - 2² = 138876357713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138876357713) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21605058 + ... + 21611484.

It is an arithmetic number, because the mean of its divisors is an integer number (4422206880).

Almost surely, 2^138876357717 is an apocalyptic number.

It is an amenable number.

138876357717 is a deficient number, since it is larger than the sum of its proper divisors (73389572523).

138876357717 is a wasteful number, since it uses less digits than its factorization.

138876357717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8394 (or 8391 counting only the distinct ones).

The product of its digits is 41489280, while the sum is 63.

The spelling of 138876357717 in words is "one hundred thirty-eight billion, eight hundred seventy-six million, three hundred fifty-seven thousand, seven hundred seventeen".