138942699805 has 32 divisors (see below), whose sum is σ = 205242799104. Its totient is φ = 87931097856.

The previous prime is 138942699803. The next prime is 138942699839. The reversal of 138942699805 is 508996249831.

It is not a de Polignac number, because 138942699805 - 2¹ = 138942699803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138942699803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3027087 + ... + 3072643.

It is an arithmetic number, because the mean of its divisors is an integer number (6413837472).

Almost surely, 2^138942699805 is an apocalyptic number.

It is an amenable number.

138942699805 is a deficient number, since it is larger than the sum of its proper divisors (66300099299).

138942699805 is a wasteful number, since it uses less digits than its factorization.

138942699805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52285.

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 138942699805 in words is "one hundred thirty-eight billion, nine hundred forty-two million, six hundred ninety-nine thousand, eight hundred five".