77982476717 has 4 divisors (see below), whose sum is σ = 77985020160. Its totient is φ = 77979933276.

The previous prime is 77982476713. The next prime is 77982476749. The reversal of 77982476717 is 71767428977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77982476717 - 2² = 77982476713 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 (77982476713) 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, 1225163 + ... + 1287240.

It is an arithmetic number, because the mean of its divisors is an integer number (19496255040).

Almost surely, 2^77982476717 is an apocalyptic number.

It is an amenable number.

77982476717 is a deficient number, since it is larger than the sum of its proper divisors (2543443).

77982476717 is a wasteful number, since it uses less digits than its factorization.

77982476717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543442.

The product of its digits is 58084992, while the sum is 65.

The spelling of 77982476717 in words is "seventy-seven billion, nine hundred eighty-two million, four hundred seventy-six thousand, seven hundred seventeen".