138834507866 has 8 divisors (see below), whose sum is σ = 208257940884. Its totient is φ = 69415194240.

The previous prime is 138834507803. The next prime is 138834507883. The reversal of 138834507866 is 668705438831.

It can be written as a sum of positive squares in 2 ways, for example, as 116368994641 + 22465513225 = 341129^2 + 149885^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 944165 + ... + 1081256.

Almost surely, 2^138834507866 is an apocalyptic number.

138834507866 is a deficient number, since it is larger than the sum of its proper divisors (69423433018).

138834507866 is a wasteful number, since it uses less digits than its factorization.

138834507866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059696.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 138834507866 in words is "one hundred thirty-eight billion, eight hundred thirty-four million, five hundred seven thousand, eight hundred sixty-six".