77417287513 has 4 divisors (see below), whose sum is σ = 81971245620. Its totient is φ = 72863329408.

The previous prime is 77417287511. The next prime is 77417287559. The reversal of 77417287513 is 31578271477.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24670356624 + 52746930889 = 157068^2 + 229667^2 .

It is a cyclic number.

It is not a de Polignac number, because 77417287513 - 2¹ = 77417287511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77417287511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276979028 + ... + 2276979061.

It is an arithmetic number, because the mean of its divisors is an integer number (20492811405).

Almost surely, 2^77417287513 is an apocalyptic number.

It is an amenable number.

77417287513 is a deficient number, since it is larger than the sum of its proper divisors (4553958107).

77417287513 is a wasteful number, since it uses less digits than its factorization.

77417287513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553958106.

The product of its digits is 2304960, while the sum is 52.

The spelling of 77417287513 in words is "seventy-seven billion, four hundred seventeen million, two hundred eighty-seven thousand, five hundred thirteen".