639919070943 has 8 divisors (see below), whose sum is σ = 856469632128. Its totient is φ = 424990611864.

The previous prime is 639919070939. The next prime is 639919070951. The reversal of 639919070943 is 349070919936.

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

It is not a de Polignac number, because 639919070943 - 2² = 639919070939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639919070143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405524605 + ... + 405526182.

It is an arithmetic number, because the mean of its divisors is an integer number (107058704016).

Almost surely, 2^639919070943 is an apocalyptic number.

639919070943 is a deficient number, since it is larger than the sum of its proper divisors (216550561185).

639919070943 is a wasteful number, since it uses less digits than its factorization.

639919070943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811051053.

The product of its (nonzero) digits is 9920232, while the sum is 60.

The spelling of 639919070943 in words is "six hundred thirty-nine billion, nine hundred nineteen million, seventy thousand, nine hundred forty-three".