500778429649 has 9 divisors (see below), whose sum is σ = 507981954441. Its totient is φ = 493675676340.

The previous prime is 500778429629. The next prime is 500778429653. The reversal of 500778429649 is 946924877005.

The square root of 500778429649 is 707657.

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

It is not a de Polignac number, because 500778429649 - 2⁵ = 500778429617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500778429629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 50238664 + ... + 50248630.

Almost surely, 2^500778429649 is an apocalyptic number.

500778429649 is the 707657-th square number.

500778429649 is the 353829-th centered octagonal number.

It is an amenable number.

500778429649 is a deficient number, since it is larger than the sum of its proper divisors (7203524792).

500778429649 is an frugal number, since it uses more digits than its factorization.

500778429649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20076 (or 10038 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 500778429649 in words is "five hundred billion, seven hundred seventy-eight million, four hundred twenty-nine thousand, six hundred forty-nine".