422191336639 has 4 divisors (see below), whose sum is σ = 424034967160. Its totient is φ = 420347706120.

The previous prime is 422191336631. The next prime is 422191336691. The reversal of 422191336639 is 936633191224.

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 422191336639 - 2³ = 422191336631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 422191336592 and 422191336601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422191336631) 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, 921814917 + ... + 921815374.

It is an arithmetic number, because the mean of its divisors is an integer number (106008741790).

Almost surely, 2^422191336639 is an apocalyptic number.

422191336639 is a deficient number, since it is larger than the sum of its proper divisors (1843630521).

422191336639 is a wasteful number, since it uses less digits than its factorization.

422191336639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843630520.

The product of its digits is 1259712, while the sum is 49.

The spelling of 422191336639 in words is "four hundred twenty-two billion, one hundred ninety-one million, three hundred thirty-six thousand, six hundred thirty-nine".