138717868751 has 8 divisors (see below), whose sum is σ = 172946953344. Its totient is φ = 108091845720.

The previous prime is 138717868739. The next prime is 138717868763. The reversal of 138717868751 is 157868717831.

It is an interprime number because it is at equal distance from previous prime (138717868739) and next prime (138717868763).

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 138717868751 - 2⁶ = 138717868687 is a prime.

It is a super-2 number, since 2×138717868751² (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 (138717868951) 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, 900765305 + ... + 900765458.

It is an arithmetic number, because the mean of its divisors is an integer number (21618369168).

Almost surely, 2^138717868751 is an apocalyptic number.

138717868751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138717868751 is a deficient number, since it is larger than the sum of its proper divisors (34229084593).

138717868751 is a wasteful number, since it uses less digits than its factorization.

138717868751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801530781.

The product of its digits is 15805440, while the sum is 62.

The spelling of 138717868751 in words is "one hundred thirty-eight billion, seven hundred seventeen million, eight hundred sixty-eight thousand, seven hundred fifty-one".