771713016647 has 4 divisors (see below), whose sum is σ = 771720275160. Its totient is φ = 771705758136.

The previous prime is 771713016643. The next prime is 771713016733. The reversal of 771713016647 is 746610317177.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 771713016647 - 2² = 771713016643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 771713016595 and 771713016604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771713016643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467372 + ... + 3683217.

It is an arithmetic number, because the mean of its divisors is an integer number (192930068790).

Almost surely, 2^771713016647 is an apocalyptic number.

771713016647 is a deficient number, since it is larger than the sum of its proper divisors (7258513).

771713016647 is a wasteful number, since it uses less digits than its factorization.

771713016647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7258512.

The product of its (nonzero) digits is 1037232, while the sum is 50.

The spelling of 771713016647 in words is "seven hundred seventy-one billion, seven hundred thirteen million, sixteen thousand, six hundred forty-seven".