642644606303 has 6 divisors (see below), whose sum is σ = 747566174736. Its totient is φ = 550838233932.

The previous prime is 642644606189. The next prime is 642644606323. The reversal of 642644606303 is 303606446246.

It is not a de Polignac number, because 642644606303 - 2⁸ = 642644606047 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 (642644606323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6557597975 + ... + 6557598072.

It is an arithmetic number, because the mean of its divisors is an integer number (124594362456).

Almost surely, 2^642644606303 is an apocalyptic number.

642644606303 is a deficient number, since it is larger than the sum of its proper divisors (104921568433).

642644606303 is a wasteful number, since it uses less digits than its factorization.

642644606303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13115196061 (or 13115196054 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 44.

The spelling of 642644606303 in words is "six hundred forty-two billion, six hundred forty-four million, six hundred six thousand, three hundred three".