138751377541 has 4 divisors (see below), whose sum is σ = 158573002912. Its totient is φ = 118929752172.

The previous prime is 138751377521. The next prime is 138751377599. The reversal of 138751377541 is 145773157831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138751377541 - 2⁵ = 138751377509 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 (138751377521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9910812675 + ... + 9910812688.

It is an arithmetic number, because the mean of its divisors is an integer number (39643250728).

Almost surely, 2^138751377541 is an apocalyptic number.

It is an amenable number.

138751377541 is a deficient number, since it is larger than the sum of its proper divisors (19821625371).

138751377541 is an equidigital number, since it uses as much as digits as its factorization.

138751377541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19821625370.

The product of its digits is 2469600, while the sum is 52.

The spelling of 138751377541 in words is "one hundred thirty-eight billion, seven hundred fifty-one million, three hundred seventy-seven thousand, five hundred forty-one".