256516616010571 has 16 divisors (see below), whose sum is σ = 299362779714304. Its totient is φ = 215260951317984.

The previous prime is 256516616010569. The next prime is 256516616010631. The reversal of 256516616010571 is 175010616615652.

It is a cyclic number.

It is not a de Polignac number, because 256516616010571 - 2¹ = 256516616010569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256516616010071) 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, 1677665100 + ... + 1677817993.

It is an arithmetic number, because the mean of its divisors is an integer number (18710173732144).

Almost surely, 2^{256516616010571} is an apocalyptic number.

256516616010571 is a deficient number, since it is larger than the sum of its proper divisors (42846163703733).

256516616010571 is a wasteful number, since it uses less digits than its factorization.

256516616010571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355483330.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 256516616010571 in words is "two hundred fifty-six trillion, five hundred sixteen billion, six hundred sixteen million, ten thousand, five hundred seventy-one".