642646241422 has 8 divisors (see below), whose sum is σ = 964211031000. Its totient is φ = 321242564424.

The previous prime is 642646241387. The next prime is 642646241437. The reversal of 642646241422 is 224142646246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×642646241422² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40268172 + ... + 40284127.

It is an arithmetic number, because the mean of its divisors is an integer number (120526378875).

Almost surely, 2^642646241422 is an apocalyptic number.

642646241422 is a deficient number, since it is larger than the sum of its proper divisors (321564789578).

642646241422 is a wasteful number, since it uses less digits than its factorization.

642646241422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80556290.

The product of its digits is 884736, while the sum is 43.

Adding to 642646241422 its reverse (224142646246), we get a palindrome (866788887668).

The spelling of 642646241422 in words is "six hundred forty-two billion, six hundred forty-six million, two hundred forty-one thousand, four hundred twenty-two".