138847284577 has 4 divisors (see below), whose sum is σ = 140919632176. Its totient is φ = 136774936980.

The previous prime is 138847284539. The next prime is 138847284601. The reversal of 138847284577 is 775482748831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 775482748831 = 7 ⋅110783249833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138847284577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138847287577) 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, 1036173699 + ... + 1036173832.

It is an arithmetic number, because the mean of its divisors is an integer number (35229908044).

Almost surely, 2^138847284577 is an apocalyptic number.

It is an amenable number.

138847284577 is a deficient number, since it is larger than the sum of its proper divisors (2072347599).

138847284577 is an equidigital number, since it uses as much as digits as its factorization.

138847284577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072347598.

The product of its digits is 84295680, while the sum is 64.

The spelling of 138847284577 in words is "one hundred thirty-eight billion, eight hundred forty-seven million, two hundred eighty-four thousand, five hundred seventy-seven".