138653281501 has 16 divisors (see below), whose sum is σ = 159322226688. Its totient is φ = 118199919600.

The previous prime is 138653281499. The next prime is 138653281513. The reversal of 138653281501 is 105182356831.

It is a happy number.

It is not a de Polignac number, because 138653281501 - 2¹ = 138653281499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138653281561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11576446 + ... + 11588416.

It is an arithmetic number, because the mean of its divisors is an integer number (9957639168).

Almost surely, 2^138653281501 is an apocalyptic number.

It is an amenable number.

138653281501 is a deficient number, since it is larger than the sum of its proper divisors (20668945187).

138653281501 is a wasteful number, since it uses less digits than its factorization.

138653281501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20832.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 138653281501 in words is "one hundred thirty-eight billion, six hundred fifty-three million, two hundred eighty-one thousand, five hundred one".