7648128139 has 2 divisors, whose sum is σ = 7648128140. Its totient is φ = 7648128138.

The previous prime is 7648128119. The next prime is 7648128143. The reversal of 7648128139 is 9318218467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7648128139 - 2¹¹ = 7648126091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7648128092 and 7648128101.

It is not a weakly prime, because it can be changed into another prime (7648128119) 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 as a sum of consecutive naturals, namely, 3824064069 + 3824064070.

It is an arithmetic number, because the mean of its divisors is an integer number (3824064070).

Almost surely, 2^7648128139 is an apocalyptic number.

7648128139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7648128139 is an equidigital number, since it uses as much as digits as its factorization.

7648128139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 7648128139 is about 87453.5770509131. The cubic root of 7648128139 is about 1970.2366124793.

The spelling of 7648128139 in words is "seven billion, six hundred forty-eight million, one hundred twenty-eight thousand, one hundred thirty-nine".