7634643617 has 4 divisors (see below), whose sum is σ = 7897907220. Its totient is φ = 7371380016.

The previous prime is 7634643581. The next prime is 7634643619. The reversal of 7634643617 is 7163464367.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7163464367 = 15601 ⋅459167.

It can be written as a sum of positive squares in 2 ways, for example, as 6406561681 + 1228081936 = 80041^2 + 35044^2 .

It is a cyclic number.

It is not a de Polignac number, because 7634643617 - 2⁶ = 7634643553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7634643619) 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, 131631758 + ... + 131631815.

It is an arithmetic number, because the mean of its divisors is an integer number (1974476805).

Almost surely, 2^7634643617 is an apocalyptic number.

It is an amenable number.

7634643617 is a deficient number, since it is larger than the sum of its proper divisors (263263603).

7634643617 is a wasteful number, since it uses less digits than its factorization.

7634643617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263263602.

The product of its digits is 1524096, while the sum is 47.

The square root of 7634643617 is about 87376.4477247731. The cubic root of 7634643617 is about 1969.0780140294.

The spelling of 7634643617 in words is "seven billion, six hundred thirty-four million, six hundred forty-three thousand, six hundred seventeen".