639934231041 has 48 divisors (see below), whose sum is σ = 1108959621120. Its totient is φ = 347882640480.

The previous prime is 639934231033. The next prime is 639934231099. The reversal of 639934231041 is 140132439936.

It is a happy number.

639934231041 is a `hidden beast` number, since 6 + 39 + 93 + 423 + 104 + 1 = 666.

It is not a de Polignac number, because 639934231041 - 2³ = 639934231033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639934231031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2661615 + ... + 2892068.

It is an arithmetic number, because the mean of its divisors is an integer number (23103325440).

Almost surely, 2^639934231041 is an apocalyptic number.

It is an amenable number.

639934231041 is a deficient number, since it is larger than the sum of its proper divisors (469025390079).

639934231041 is a wasteful number, since it uses less digits than its factorization.

639934231041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553786 (or 5553783 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 639934231041 in words is "six hundred thirty-nine billion, nine hundred thirty-four million, two hundred thirty-one thousand, forty-one".