257348534091 has 16 divisors (see below), whose sum is σ = 394026464640. Its totient is φ = 147759923520.

The previous prime is 257348534063. The next prime is 257348534143. The reversal of 257348534091 is 190435843752.

It is not a de Polignac number, because 257348534091 - 2⁵ = 257348534059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257348534021) 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, 205221490 + ... + 205222743.

It is an arithmetic number, because the mean of its divisors is an integer number (24626654040).

Almost surely, 2^257348534091 is an apocalyptic number.

257348534091 is a deficient number, since it is larger than the sum of its proper divisors (136677930549).

257348534091 is a wasteful number, since it uses less digits than its factorization.

257348534091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410444266.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 257348534091 in words is "two hundred fifty-seven billion, three hundred forty-eight million, five hundred thirty-four thousand, ninety-one".