642621636233 has 8 divisors (see below), whose sum is σ = 643517864256. Its totient is φ = 641725686000.

The previous prime is 642621636227. The next prime is 642621636269. The reversal of 642621636233 is 332636126246.

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 642621636233 - 2⁸ = 642621635977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642621633233) 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, 4796708 + ... + 4928858.

It is an arithmetic number, because the mean of its divisors is an integer number (80439733032).

Almost surely, 2^642621636233 is an apocalyptic number.

It is an amenable number.

642621636233 is a deficient number, since it is larger than the sum of its proper divisors (896228023).

642621636233 is a wasteful number, since it uses less digits than its factorization.

642621636233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138895.

The product of its digits is 1119744, while the sum is 44.

The spelling of 642621636233 in words is "six hundred forty-two billion, six hundred twenty-one million, six hundred thirty-six thousand, two hundred thirty-three".