782664544449 has 6 divisors (see below), whose sum is σ = 1130515453106. Its totient is φ = 521776362960.

The previous prime is 782664544429. The next prime is 782664544511. The reversal of 782664544449 is 944445466287.

782664544449 is a `hidden beast` number, since 7 + 8 + 26 + 64 + 544 + 4 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 464500860849 + 318163683600 = 681543^2 + 564060^2 .

It is not a de Polignac number, because 782664544449 - 2¹⁶ = 782664478913 is a prime.

It is a super-2 number, since 2×782664544449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (782664544429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43481363572 + ... + 43481363589.

Almost surely, 2^782664544449 is an apocalyptic number.

It is an amenable number.

782664544449 is a deficient number, since it is larger than the sum of its proper divisors (347850908657).

782664544449 is a wasteful number, since it uses less digits than its factorization.

782664544449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86962727167 (or 86962727164 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 63.

The spelling of 782664544449 in words is "seven hundred eighty-two billion, six hundred sixty-four million, five hundred forty-four thousand, four hundred forty-nine".