639573361429 has 8 divisors (see below), whose sum is σ = 692944053120. Its totient is φ = 587952528576.

The previous prime is 639573361421. The next prime is 639573361457. The reversal of 639573361429 is 924163375936.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 639573361429 - 2³ = 639573361421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639573361421) by changing a digit.

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, 437463949 + ... + 437465410.

It is an arithmetic number, because the mean of its divisors is an integer number (86618006640).

Almost surely, 2^639573361429 is an apocalyptic number.

It is an amenable number.

639573361429 is a deficient number, since it is larger than the sum of its proper divisors (53370691691).

639573361429 is a wasteful number, since it uses less digits than its factorization.

639573361429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874929419.

The product of its digits is 22044960, while the sum is 58.

The spelling of 639573361429 in words is "six hundred thirty-nine billion, five hundred seventy-three million, three hundred sixty-one thousand, four hundred twenty-nine".