256551047773 has 16 divisors (see below), whose sum is σ = 260674928640. Its totient is φ = 252470761200.

The previous prime is 256551047693. The next prime is 256551047777. The reversal of 256551047773 is 377740155652.

It is a cyclic number.

It is not a de Polignac number, because 256551047773 - 2⁹ = 256551047261 is a prime.

It is a super-2 number, since 2×256551047773² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256551047773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256551047777) 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, 6711208 + ... + 6749326.

It is an arithmetic number, because the mean of its divisors is an integer number (16292183040).

Almost surely, 2^256551047773 is an apocalyptic number.

It is an amenable number.

256551047773 is a deficient number, since it is larger than the sum of its proper divisors (4123880867).

256551047773 is a wasteful number, since it uses less digits than its factorization.

256551047773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38688.

The product of its (nonzero) digits is 6174000, while the sum is 52.

The spelling of 256551047773 in words is "two hundred fifty-six billion, five hundred fifty-one million, forty-seven thousand, seven hundred seventy-three".