138463881481 has 16 divisors (see below), whose sum is σ = 145199976768. Its totient is φ = 131890348800.

The previous prime is 138463881463. The next prime is 138463881529. The reversal of 138463881481 is 184188364831.

It is a cyclic number.

It is not a de Polignac number, because 138463881481 - 2⁵ = 138463881449 is a prime.

It is a super-2 number, since 2×138463881481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138463881581) 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, 4598766 + ... + 4628776.

It is an arithmetic number, because the mean of its divisors is an integer number (9074998548).

Almost surely, 2^138463881481 is an apocalyptic number.

It is an amenable number.

138463881481 is a deficient number, since it is larger than the sum of its proper divisors (6736095287).

138463881481 is a wasteful number, since it uses less digits than its factorization.

138463881481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32712.

The product of its digits is 3538944, while the sum is 55.

The spelling of 138463881481 in words is "one hundred thirty-eight billion, four hundred sixty-three million, eight hundred eighty-one thousand, four hundred eighty-one".