642605671713 has 8 divisors (see below), whose sum is σ = 894060065088. Its totient is φ = 409777529744.

The previous prime is 642605671663. The next prime is 642605671753. The reversal of 642605671713 is 317176506246.

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 642605671713 - 2¹³ = 642605663521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642605671753) 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, 4656562770 + ... + 4656562907.

It is an arithmetic number, because the mean of its divisors is an integer number (111757508136).

Almost surely, 2^642605671713 is an apocalyptic number.

It is an amenable number.

642605671713 is a deficient number, since it is larger than the sum of its proper divisors (251454393375).

642605671713 is a wasteful number, since it uses less digits than its factorization.

642605671713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313125703.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 642605671713 in words is "six hundred forty-two billion, six hundred five million, six hundred seventy-one thousand, seven hundred thirteen".