256677470545 has 16 divisors (see below), whose sum is σ = 325569530880. Its totient is φ = 193727289600.

The previous prime is 256677470527. The next prime is 256677470549. The reversal of 256677470545 is 545074776652.

256677470545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256677470545 - 2²¹ = 256675373393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256677470545.

It is not an unprimeable number, because it can be changed into a prime (256677470549) 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 15 ways as a sum of consecutive naturals, for example, 5582641 + ... + 5628430.

It is an arithmetic number, because the mean of its divisors is an integer number (20348095680).

Almost surely, 2^256677470545 is an apocalyptic number.

It is an amenable number.

256677470545 is a deficient number, since it is larger than the sum of its proper divisors (68892060335).

256677470545 is a wasteful number, since it uses less digits than its factorization.

256677470545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211336.

The product of its (nonzero) digits is 49392000, while the sum is 58.

The spelling of 256677470545 in words is "two hundred fifty-six billion, six hundred seventy-seven million, four hundred seventy thousand, five hundred forty-five".