138886780131 has 48 divisors (see below), whose sum is σ = 219897899520. Its totient is φ = 83772480960.

The previous prime is 138886780129. The next prime is 138886780133. The reversal of 138886780131 is 131087688831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138886780129) and next prime (138886780133).

It is not a de Polignac number, because 138886780131 - 2¹ = 138886780129 is a prime.

It is a super-2 number, since 2×138886780131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138886780133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18998505 + ... + 19005813.

It is an arithmetic number, because the mean of its divisors is an integer number (4581206240).

Almost surely, 2^138886780131 is an apocalyptic number.

138886780131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138886780131 is a deficient number, since it is larger than the sum of its proper divisors (81011119389).

138886780131 is a wasteful number, since it uses less digits than its factorization.

138886780131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 8213 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 138886780131 in words is "one hundred thirty-eight billion, eight hundred eighty-six million, seven hundred eighty thousand, one hundred thirty-one".