139936666849 has 16 divisors (see below), whose sum is σ = 164954994048. Its totient is φ = 116203012992.

The previous prime is 139936666847. The next prime is 139936666921. The reversal of 139936666849 is 948666639931.

It is a cyclic number.

It is not a de Polignac number, because 139936666849 - 2¹ = 139936666847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139936666847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099087 + ... + 1219780.

It is an arithmetic number, because the mean of its divisors is an integer number (10309687128).

Almost surely, 2^139936666849 is an apocalyptic number.

It is an amenable number.

139936666849 is a deficient number, since it is larger than the sum of its proper divisors (25018327199).

139936666849 is a wasteful number, since it uses less digits than its factorization.

139936666849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319144.

The product of its digits is 272097792, while the sum is 70.

The spelling of 139936666849 in words is "one hundred thirty-nine billion, nine hundred thirty-six million, six hundred sixty-six thousand, eight hundred forty-nine".