647607735839 has 2 divisors, whose sum is σ = 647607735840. Its totient is φ = 647607735838.

The previous prime is 647607735829. The next prime is 647607735847. The reversal of 647607735839 is 938537706746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647607735839 - 2²⁰ = 647606687263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647607735829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323803867919 + 323803867920.

It is an arithmetic number, because the mean of its divisors is an integer number (323803867920).

Almost surely, 2^647607735839 is an apocalyptic number.

647607735839 is a deficient number, since it is larger than the sum of its proper divisors (1).

647607735839 is an equidigital number, since it uses as much as digits as its factorization.

647607735839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160030080, while the sum is 65.

The spelling of 647607735839 in words is "six hundred forty-seven billion, six hundred seven million, seven hundred thirty-five thousand, eight hundred thirty-nine".