780808575647 has 4 divisors (see below), whose sum is σ = 807733009320. Its totient is φ = 753884141976.

The previous prime is 780808575623. The next prime is 780808575661. The reversal of 780808575647 is 746575808087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746575808087 = 3229 ⋅231209603.

It is a cyclic number.

It is not a de Polignac number, because 780808575647 - 2⁶ = 780808575583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780808575697) 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, 13462216793 + ... + 13462216850.

It is an arithmetic number, because the mean of its divisors is an integer number (201933252330).

Almost surely, 2^780808575647 is an apocalyptic number.

780808575647 is a deficient number, since it is larger than the sum of its proper divisors (26924433673).

780808575647 is a wasteful number, since it uses less digits than its factorization.

780808575647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26924433672.

The product of its (nonzero) digits is 105369600, while the sum is 65.

The spelling of 780808575647 in words is "seven hundred eighty billion, eight hundred eight million, five hundred seventy-five thousand, six hundred forty-seven".