6425777772 has 54 divisors (see below), whose sum is σ = 16596091148. Its totient is φ = 2096327088.

The previous prime is 6425777749. The next prime is 6425777779. The reversal of 6425777772 is 2777775246.

6425777772 is a `hidden beast` number, since 64 + 2 + 577 + 7 + 7 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (6425777779) 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 17 ways as a sum of consecutive naturals, for example, 39123 + ... + 119925.

Almost surely, 2^6425777772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6425777772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8298045574).

6425777772 is an abundant number, since it is smaller than the sum of its proper divisors (10170313376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6425777772 is a wasteful number, since it uses less digits than its factorization.

6425777772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80907 (or 80855 counting only the distinct ones).

The product of its digits is 8067360, while the sum is 54.

The square root of 6425777772 is about 80160.9491710272. The cubic root of 6425777772 is about 1859.1248987835.

The spelling of 6425777772 in words is "six billion, four hundred twenty-five million, seven hundred seventy-seven thousand, seven hundred seventy-two".