138751653281 has 8 divisors (see below), whose sum is σ = 141081759744. Its totient is φ = 136440884160.

The previous prime is 138751653247. The next prime is 138751653289. The reversal of 138751653281 is 182356157831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138751653281 is a prime.

It is a super-2 number, since 2×138751653281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138751653289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4819865 + ... + 4848566.

It is an arithmetic number, because the mean of its divisors is an integer number (17635219968).

Almost surely, 2^138751653281 is an apocalyptic number.

It is an amenable number.

138751653281 is a deficient number, since it is larger than the sum of its proper divisors (2330106463).

138751653281 is a wasteful number, since it uses less digits than its factorization.

138751653281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9668671.

The product of its digits is 1209600, while the sum is 50.

The spelling of 138751653281 in words is "one hundred thirty-eight billion, seven hundred fifty-one million, six hundred fifty-three thousand, two hundred eighty-one".