256766545 has 16 divisors (see below), whose sum is σ = 360328320. Its totient is φ = 171972864.

The previous prime is 256766539. The next prime is 256766557. The reversal of 256766545 is 545667652.

It is not a de Polignac number, because 256766545 - 2¹³ = 256758353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256766495 and 256766504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83800 + ... + 86809.

It is an arithmetic number, because the mean of its divisors is an integer number (22520520).

Almost surely, 2^256766545 is an apocalyptic number.

It is an amenable number.

256766545 is a deficient number, since it is larger than the sum of its proper divisors (103561775).

256766545 is a wasteful number, since it uses less digits than its factorization.

256766545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170664.

The product of its digits is 1512000, while the sum is 46.

The square root of 256766545 is about 16023.9366261852. The cubic root of 256766545 is about 635.5935467491.

The spelling of 256766545 in words is "two hundred fifty-six million, seven hundred sixty-six thousand, five hundred forty-five".