256773016516 has 12 divisors (see below), whose sum is σ = 449993800620. Its totient is φ = 128203359200.

The previous prime is 256773016481. The next prime is 256773016573. The reversal of 256773016516 is 615610377652.

It can be written as a sum of positive squares in 2 ways, for example, as 105140656516 + 151632360000 = 324254^2 + 389400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256773016516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45784111 + ... + 45789718.

It is an arithmetic number, because the mean of its divisors is an integer number (37499483385).

Almost surely, 2^256773016516 is an apocalyptic number.

It is an amenable number.

256773016516 is a deficient number, since it is larger than the sum of its proper divisors (193220784104).

256773016516 is a wasteful number, since it uses less digits than its factorization.

256773016516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91574534 (or 91574532 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 256773016516 in words is "two hundred fifty-six billion, seven hundred seventy-three million, sixteen thousand, five hundred sixteen".