138531108763 has 16 divisors (see below), whose sum is σ = 144291486976. Its totient is φ = 132922801440.

The previous prime is 138531108761. The next prime is 138531108827. The reversal of 138531108763 is 367801135831.

It is a cyclic number.

It is not a de Polignac number, because 138531108763 - 2¹ = 138531108761 is a prime.

It is a super-2 number, since 2×138531108763² (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 (138531108761) 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 15 ways as a sum of consecutive naturals, for example, 256420 + ... + 585502.

It is an arithmetic number, because the mean of its divisors is an integer number (9018217936).

Almost surely, 2^138531108763 is an apocalyptic number.

138531108763 is a deficient number, since it is larger than the sum of its proper divisors (5760378213).

138531108763 is a wasteful number, since it uses less digits than its factorization.

138531108763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329314.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 138531108763 in words is "one hundred thirty-eight billion, five hundred thirty-one million, one hundred eight thousand, seven hundred sixty-three".