77313224449 has 16 divisors (see below), whose sum is σ = 79335435600. Its totient is φ = 75318312960.

The previous prime is 77313224413. The next prime is 77313224467. The reversal of 77313224449 is 94442231377.

It can be written as a sum of positive squares in 8 ways, for example, as 12202516225 + 65110708224 = 110465^2 + 255168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77313224449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77313224399 and 77313224408.

It is not an unprimeable number, because it can be changed into a prime (77313224249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3196369 + ... + 3220465.

It is an arithmetic number, because the mean of its divisors is an integer number (4958464725).

Almost surely, 2^77313224449 is an apocalyptic number.

It is an amenable number.

77313224449 is a deficient number, since it is larger than the sum of its proper divisors (2022211151).

77313224449 is a wasteful number, since it uses less digits than its factorization.

77313224449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24660.

The product of its digits is 1016064, while the sum is 46.

The spelling of 77313224449 in words is "seventy-seven billion, three hundred thirteen million, two hundred twenty-four thousand, four hundred forty-nine".