138143267945 has 8 divisors (see below), whose sum is σ = 175523211144. Its totient is φ = 104013754624.

The previous prime is 138143267903. The next prime is 138143268017. The reversal of 138143267945 is 549762341831.

It can be written as a sum of positive squares in 4 ways, for example, as 46860126784 + 91283141161 = 216472^2 + 302131^2 .

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 138143267945 - 2⁶ = 138143267881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812607374 + ... + 812607543.

It is an arithmetic number, because the mean of its divisors is an integer number (21940401393).

Almost surely, 2^138143267945 is an apocalyptic number.

It is an amenable number.

138143267945 is a deficient number, since it is larger than the sum of its proper divisors (37379943199).

138143267945 is a wasteful number, since it uses less digits than its factorization.

138143267945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625214939.

The product of its digits is 4354560, while the sum is 53.

The spelling of 138143267945 in words is "one hundred thirty-eight billion, one hundred forty-three million, two hundred sixty-seven thousand, nine hundred forty-five".