77382443329 has 3 divisors (see below), whose sum is σ = 77382721507. Its totient is φ = 77382165152.

The previous prime is 77382443323. The next prime is 77382443377. The reversal of 77382443329 is 92334428377.

It is a happy number.

The square root of 77382443329 is 278177.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92334428377 = 37087 ⋅2489671.

It can be written as a sum of positive squares in only one way, i.e., 8713289025 + 68669154304 = 93345^2 + 262048^2 .

It is not a de Polignac number, because 77382443329 - 2²³ = 77374054721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77382443323) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 139089 + ... + 417265.

Almost surely, 2^77382443329 is an apocalyptic number.

77382443329 is the 278177-th square number.

77382443329 is the 139089-th centered octagonal number.

It is an amenable number.

77382443329 is a deficient number, since it is larger than the sum of its proper divisors (278178).

77382443329 is an frugal number, since it uses more digits than its factorization.

77382443329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556354 (or 278177 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 52.

The spelling of 77382443329 in words is "seventy-seven billion, three hundred eighty-two million, four hundred forty-three thousand, three hundred twenty-nine".