138771452447 has 8 divisors (see below), whose sum is σ = 139804156800. Its totient is φ = 137739239064.

The previous prime is 138771452381. The next prime is 138771452461. The reversal of 138771452447 is 744254177831.

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

It is a cyclic number.

It is not a de Polignac number, because 138771452447 - 2⁸ = 138771452191 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 (138771452647) 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, 454718 + ... + 695924.

It is an arithmetic number, because the mean of its divisors is an integer number (17475519600).

Almost surely, 2^138771452447 is an apocalyptic number.

138771452447 is a deficient number, since it is larger than the sum of its proper divisors (1032704353).

138771452447 is a wasteful number, since it uses less digits than its factorization.

138771452447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245485.

The product of its digits is 5268480, while the sum is 53.

The spelling of 138771452447 in words is "one hundred thirty-eight billion, seven hundred seventy-one million, four hundred fifty-two thousand, four hundred forty-seven".