783920764449 has 15 divisors (see below), whose sum is σ = 1171054033347. Its totient is φ = 522608530608.

The previous prime is 783920764423. The next prime is 783920764481. The reversal of 783920764449 is 944467029387.

The square root of 783920764449 is 885393.

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

783920764449 is a `hidden beast` number, since 78 + 39 + 20 + 76 + 4 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 235977350625 + 547943413824 = 485775^2 + 740232^2 .

It is not a de Polignac number, because 783920764449 - 2²¹ = 783918667297 is a prime.

It is a super-2 number, since 2×783920764449² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (783920764489) 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 14 ways as a sum of consecutive naturals, for example, 7919349 + ... + 8017725.

Almost surely, 2^783920764449 is an apocalyptic number.

783920764449 is the 885393-rd square number.

783920764449 is the 442697-th centered octagonal number.

It is an amenable number.

783920764449 is a deficient number, since it is larger than the sum of its proper divisors (387133268898).

783920764449 is an frugal number, since it uses more digits than its factorization.

783920764449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196766 (or 98380 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 783920764449 in words is "seven hundred eighty-three billion, nine hundred twenty million, seven hundred sixty-four thousand, four hundred forty-nine".