642506708003 has 4 divisors (see below), whose sum is σ = 670441782288. Its totient is φ = 614571633720.

The previous prime is 642506707897. The next prime is 642506708017. The reversal of 642506708003 is 300807605246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642506708003 - 2²² = 642502513699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642506708303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13967537108 + ... + 13967537153.

It is an arithmetic number, because the mean of its divisors is an integer number (167610445572).

Almost surely, 2^642506708003 is an apocalyptic number.

642506708003 is a deficient number, since it is larger than the sum of its proper divisors (27935074285).

642506708003 is a wasteful number, since it uses less digits than its factorization.

642506708003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27935074284.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 642506708003 in words is "six hundred forty-two billion, five hundred six million, seven hundred eight thousand, three".