7720388609 has 8 divisors (see below), whose sum is σ = 7732985568. Its totient is φ = 7707804480.

The previous prime is 7720388581. The next prime is 7720388639. The reversal of 7720388609 is 9068830277.

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 a de Polignac number, because none of the positive numbers 2^k-7720388609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7720388639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2316074 + ... + 2319404.

It is an arithmetic number, because the mean of its divisors is an integer number (966623196).

Almost surely, 2^7720388609 is an apocalyptic number.

It is an amenable number.

7720388609 is a deficient number, since it is larger than the sum of its proper divisors (12596959).

7720388609 is a wasteful number, since it uses less digits than its factorization.

7720388609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 7720388609 is about 87865.7419532778. The cubic root of 7720388609 is about 1976.4221863706.

The spelling of 7720388609 in words is "seven billion, seven hundred twenty million, three hundred eighty-eight thousand, six hundred nine".