7648647137 has 4 divisors (see below), whose sum is σ = 7912393620. Its totient is φ = 7384900656.

The previous prime is 7648647121. The next prime is 7648647179. The reversal of 7648647137 is 7317468467.

7648647137 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7317468467 = 1669 ⋅4384343.

It can be written as a sum of positive squares in 2 ways, for example, as 2006233681 + 5642413456 = 44791^2 + 75116^2 .

It is a cyclic number.

It is not a de Polignac number, because 7648647137 - 2⁴ = 7648647121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7648647637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131873198 + ... + 131873255.

It is an arithmetic number, because the mean of its divisors is an integer number (1978098405).

Almost surely, 2^7648647137 is an apocalyptic number.

It is an amenable number.

7648647137 is a deficient number, since it is larger than the sum of its proper divisors (263746483).

7648647137 is a wasteful number, since it uses less digits than its factorization.

7648647137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263746482.

The product of its digits is 4741632, while the sum is 53.

The square root of 7648647137 is about 87456.5442777154. The cubic root of 7648647137 is about 1970.2811778820.

The spelling of 7648647137 in words is "seven billion, six hundred forty-eight million, six hundred forty-seven thousand, one hundred thirty-seven".