257543737213 has 24 divisors (see below), whose sum is σ = 301243351104. Its totient is φ = 219537561600.

The previous prime is 257543737163. The next prime is 257543737271. The reversal of 257543737213 is 312737345752.

It is not a de Polignac number, because 257543737213 - 2⁹ = 257543736701 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257543737613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7929978 + ... + 7962388.

It is an arithmetic number, because the mean of its divisors is an integer number (12551806296).

Almost surely, 2^257543737213 is an apocalyptic number.

It is an amenable number.

257543737213 is a deficient number, since it is larger than the sum of its proper divisors (43699613891).

257543737213 is a wasteful number, since it uses less digits than its factorization.

257543737213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313 (or 33306 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 49.

The spelling of 257543737213 in words is "two hundred fifty-seven billion, five hundred forty-three million, seven hundred thirty-seven thousand, two hundred thirteen".