257046020361215 has 16 divisors (see below), whose sum is σ = 334194990088608. Its totient is φ = 189039590347776.

The previous prime is 257046020361209. The next prime is 257046020361217. The reversal of 257046020361215 is 512163020640752.

It is a cyclic number.

It is not a de Polignac number, because 257046020361215 - 2⁸ = 257046020360959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257046020361217) 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, 35163610622 + ... + 35163617931.

It is an arithmetic number, because the mean of its divisors is an integer number (20887186880538).

Almost surely, 2^{257046020361215} is an apocalyptic number.

257046020361215 is a deficient number, since it is larger than the sum of its proper divisors (77148969727393).

257046020361215 is a wasteful number, since it uses less digits than its factorization.

257046020361215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70327228618.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 257046020361215 in words is "two hundred fifty-seven trillion, forty-six billion, twenty million, three hundred sixty-one thousand, two hundred fifteen".