642248622089 has 4 divisors (see below), whose sum is σ = 642953616000. Its totient is φ = 641543628180.

The previous prime is 642248622073. The next prime is 642248622107. The reversal of 642248622089 is 980226842246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642248622089 - 2⁴ = 642248622073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642248622089.

It is not an unprimeable number, because it can be changed into a prime (642248624089) 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, 352495589 + ... + 352497410.

It is an arithmetic number, because the mean of its divisors is an integer number (160738404000).

Almost surely, 2^642248622089 is an apocalyptic number.

It is an amenable number.

642248622089 is a deficient number, since it is larger than the sum of its proper divisors (704993911).

642248622089 is an equidigital number, since it uses as much as digits as its factorization.

642248622089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704993910.

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 642248622089 in words is "six hundred forty-two billion, two hundred forty-eight million, six hundred twenty-two thousand, eighty-nine".