1639743743239 has 16 divisors (see below), whose sum is σ = 1891347447808. Its totient is φ = 1392509143872.

The previous prime is 1639743743237. The next prime is 1639743743249. The reversal of 1639743743239 is 9323473479361.

It is not a de Polignac number, because 1639743743239 - 2¹ = 1639743743237 is a prime.

It is a super-2 number, since 2×1639743743239² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639743743233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622254 + ... + 1914859.

It is an arithmetic number, because the mean of its divisors is an integer number (118209215488).

Almost surely, 2^{1639743743239} is an apocalyptic number.

1639743743239 is a deficient number, since it is larger than the sum of its proper divisors (251603704569).

1639743743239 is a wasteful number, since it uses less digits than its factorization.

1639743743239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537974.

The product of its digits is 61725888, while the sum is 61.

The spelling of 1639743743239 in words is "one trillion, six hundred thirty-nine billion, seven hundred forty-three million, seven hundred forty-three thousand, two hundred thirty-nine".