7742425777 has 4 divisors (see below), whose sum is σ = 7788787776. Its totient is φ = 7696063780.

The previous prime is 7742425741. The next prime is 7742425783. The reversal of 7742425777 is 7775242477.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7742425777 - 2¹¹ = 7742423729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7742425727) 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 3 ways as a sum of consecutive naturals, for example, 23180749 + ... + 23181082.

It is an arithmetic number, because the mean of its divisors is an integer number (1947196944).

Almost surely, 2^7742425777 is an apocalyptic number.

It is an amenable number.

7742425777 is a deficient number, since it is larger than the sum of its proper divisors (46361999).

7742425777 is a wasteful number, since it uses less digits than its factorization.

7742425777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46361998.

The product of its digits is 5378240, while the sum is 52.

The square root of 7742425777 is about 87991.0550965267. The cubic root of 7742425777 is about 1978.3009075289.

The spelling of 7742425777 in words is "seven billion, seven hundred forty-two million, four hundred twenty-five thousand, seven hundred seventy-seven".