642227176709 has 8 divisors (see below), whose sum is σ = 643889621760. Its totient is φ = 640564957296.

The previous prime is 642227176693. The next prime is 642227176781. The reversal of 642227176709 is 907671722246.

It is a happy number.

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 642227176709 - 2⁴ = 642227176693 is a prime.

It is a super-2 number, since 2×642227176709² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642227172709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6678632 + ... + 6774110.

It is an arithmetic number, because the mean of its divisors is an integer number (80486202720).

Almost surely, 2^642227176709 is an apocalyptic number.

It is an amenable number.

642227176709 is a deficient number, since it is larger than the sum of its proper divisors (1662445051).

642227176709 is a wasteful number, since it uses less digits than its factorization.

642227176709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112819.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 642227176709 in words is "six hundred forty-two billion, two hundred twenty-seven million, one hundred seventy-six thousand, seven hundred nine".