138881156541 has 8 divisors (see below), whose sum is σ = 186105403200. Its totient is φ = 92122173792.

The previous prime is 138881156497. The next prime is 138881156543. The reversal of 138881156541 is 145651188831.

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

It is a de Polignac number, because none of the positive numbers 2^k-138881156541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138881156543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116315280 + ... + 116316473.

It is an arithmetic number, because the mean of its divisors is an integer number (23263175400).

Almost surely, 2^138881156541 is an apocalyptic number.

It is an amenable number.

138881156541 is a deficient number, since it is larger than the sum of its proper divisors (47224246659).

138881156541 is a wasteful number, since it uses less digits than its factorization.

138881156541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232631955.

The product of its digits is 921600, while the sum is 51.

The spelling of 138881156541 in words is "one hundred thirty-eight billion, eight hundred eighty-one million, one hundred fifty-six thousand, five hundred forty-one".