138406270964 has 24 divisors (see below), whose sum is σ = 260882446440. Its totient is φ = 63870056064.

The previous prime is 138406270943. The next prime is 138406270991. The reversal of 138406270964 is 469072604831.

It can be written as a sum of positive squares in 4 ways, for example, as 16215475600 + 122190795364 = 127340^2 + 349558^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145922 + ... + 545990.

It is an arithmetic number, because the mean of its divisors is an integer number (10870101935).

Almost surely, 2^138406270964 is an apocalyptic number.

It is an amenable number.

138406270964 is a deficient number, since it is larger than the sum of its proper divisors (122476175476).

138406270964 is a wasteful number, since it uses less digits than its factorization.

138406270964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406739 (or 406737 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 138406270964 in words is "one hundred thirty-eight billion, four hundred six million, two hundred seventy thousand, nine hundred sixty-four".