7642158647 has 2 divisors, whose sum is σ = 7642158648. Its totient is φ = 7642158646.

The previous prime is 7642158613. The next prime is 7642158649. The reversal of 7642158647 is 7468512467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7642158647 - 2⁶ = 7642158583 is a prime.

Together with 7642158649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7642158595 and 7642158604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7642158649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821079323 + 3821079324.

It is an arithmetic number, because the mean of its divisors is an integer number (3821079324).

Almost surely, 2^7642158647 is an apocalyptic number.

7642158647 is a deficient number, since it is larger than the sum of its proper divisors (1).

7642158647 is an equidigital number, since it uses as much as digits as its factorization.

7642158647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 50.

The square root of 7642158647 is about 87419.4408984638. The cubic root of 7642158647 is about 1969.7238781746.

The spelling of 7642158647 in words is "seven billion, six hundred forty-two million, one hundred fifty-eight thousand, six hundred forty-seven".