257520081267 has 6 divisors (see below), whose sum is σ = 371973450732. Its totient is φ = 171680054172.

The previous prime is 257520081199. The next prime is 257520081271. The reversal of 257520081267 is 762180025752.

257520081267 is a `hidden beast` number, since 2 + 57 + 520 + 0 + 8 + 12 + 67 = 666.

It is not a de Polignac number, because 257520081267 - 2¹⁹ = 257519556979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257520181267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14306671173 + ... + 14306671190.

It is an arithmetic number, because the mean of its divisors is an integer number (61995575122).

Almost surely, 2^257520081267 is an apocalyptic number.

257520081267 is a deficient number, since it is larger than the sum of its proper divisors (114453369465).

257520081267 is a wasteful number, since it uses less digits than its factorization.

257520081267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28613342369 (or 28613342366 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 257520081267 in words is "two hundred fifty-seven billion, five hundred twenty million, eighty-one thousand, two hundred sixty-seven".