642221136613 has 8 divisors (see below), whose sum is σ = 734800127040. Its totient is φ = 549850424640.

The previous prime is 642221136541. The next prime is 642221136631. The reversal of 642221136613 is 316631122246.

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 642221136613 - 2²⁵ = 642187582181 is a prime.

It is a super-2 number, since 2×642221136613² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642221130613) 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, 52063003 + ... + 52075336.

It is an arithmetic number, because the mean of its divisors is an integer number (91850015880).

Almost surely, 2^642221136613 is an apocalyptic number.

It is an amenable number.

642221136613 is a deficient number, since it is larger than the sum of its proper divisors (92578990427).

642221136613 is a wasteful number, since it uses less digits than its factorization.

642221136613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104139227.

The product of its digits is 62208, while the sum is 37.

Adding to 642221136613 its reverse (316631122246), we get a palindrome (958852258859).

The spelling of 642221136613 in words is "six hundred forty-two billion, two hundred twenty-one million, one hundred thirty-six thousand, six hundred thirteen".