71647830647 has 2 divisors, whose sum is σ = 71647830648. Its totient is φ = 71647830646.

The previous prime is 71647830643. The next prime is 71647830671. The reversal of 71647830647 is 74603874617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71647830647 - 2² = 71647830643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71647830643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35823915323 + 35823915324.

It is an arithmetic number, because the mean of its divisors is an integer number (35823915324).

Almost surely, 2^71647830647 is an apocalyptic number.

71647830647 is a deficient number, since it is larger than the sum of its proper divisors (1).

71647830647 is an equidigital number, since it uses as much as digits as its factorization.

71647830647 is an evil number, because the sum of its binary digits is even.

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

The spelling of 71647830647 in words is "seventy-one billion, six hundred forty-seven million, eight hundred thirty thousand, six hundred forty-seven".