6422579881 has 3 divisors (see below), whose sum is σ = 6422660023. Its totient is φ = 6422499740.

The previous prime is 6422579873. The next prime is 6422579903. The reversal of 6422579881 is 1889752246.

The square root of 6422579881 is 80141.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2390329881 + 4032250000 = 48891^2 + 63500^2 .

It is not a de Polignac number, because 6422579881 - 2³ = 6422579873 is a prime.

It is a super-2 number, since 2×6422579881² = 82499064655651948322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6422579981) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40071 + ... + 120211.

Almost surely, 2^6422579881 is an apocalyptic number.

6422579881 is the 80141-st square number.

6422579881 is the 40071-st centered octagonal number.

It is an amenable number.

6422579881 is a deficient number, since it is larger than the sum of its proper divisors (80142).

6422579881 is an frugal number, since it uses more digits than its factorization.

6422579881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160282 (or 80141 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The cubic root of 6422579881 is about 1858.8164398690.

The spelling of 6422579881 in words is "six billion, four hundred twenty-two million, five hundred seventy-nine thousand, eight hundred eighty-one".