257730705213 has 16 divisors (see below), whose sum is σ = 358636576320. Its totient is φ = 164427517184.

The previous prime is 257730705161. The next prime is 257730705347. The reversal of 257730705213 is 312507037752.

It is a cyclic number.

It is not a de Polignac number, because 257730705213 - 2²¹ = 257728608061 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257730705013) 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, 13098231 + ... + 13117892.

It is an arithmetic number, because the mean of its divisors is an integer number (22414786020).

Almost surely, 2^257730705213 is an apocalyptic number.

It is an amenable number.

257730705213 is a deficient number, since it is larger than the sum of its proper divisors (100905871107).

257730705213 is a wasteful number, since it uses less digits than its factorization.

257730705213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26216268.

The product of its (nonzero) digits is 308700, while the sum is 42.

The spelling of 257730705213 in words is "two hundred fifty-seven billion, seven hundred thirty million, seven hundred five thousand, two hundred thirteen".