6422355981 has 12 divisors (see below), whose sum is σ = 9290779420. Its totient is φ = 4275089280.

The previous prime is 6422355977. The next prime is 6422355997. The reversal of 6422355981 is 1895532246.

6422355981 is a `hidden beast` number, since 6 + 4 + 22 + 35 + 598 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2310340356 + 4112015625 = 48066^2 + 64125^2 .

It is not a de Polignac number, because 6422355981 - 2² = 6422355977 is a prime.

It is a super-2 number, since 2×6422355981² = 82493312693372944722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6422355971) 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 11 ways as a sum of consecutive naturals, for example, 533836 + ... + 545733.

Almost surely, 2^6422355981 is an apocalyptic number.

It is an amenable number.

6422355981 is a deficient number, since it is larger than the sum of its proper divisors (2868423439).

6422355981 is a wasteful number, since it uses less digits than its factorization.

6422355981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080236 (or 1080233 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 6422355981 is about 80139.6030748843. The cubic root of 6422355981 is about 1858.7948393157.

The spelling of 6422355981 in words is "six billion, four hundred twenty-two million, three hundred fifty-five thousand, nine hundred eighty-one".