257340617618 has 32 divisors (see below), whose sum is σ = 452059470720. Its totient is φ = 107570131200.

The previous prime is 257340617617. The next prime is 257340617641. The reversal of 257340617618 is 816716043752.

It is not an unprimeable number, because it can be changed into a prime (257340617617) 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, 117098 + ... + 726906.

It is an arithmetic number, because the mean of its divisors is an integer number (14126858460).

Almost surely, 2^257340617618 is an apocalyptic number.

257340617618 is a deficient number, since it is larger than the sum of its proper divisors (194718853102).

257340617618 is a wasteful number, since it uses less digits than its factorization.

257340617618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610562.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 257340617618 in words is "two hundred fifty-seven billion, three hundred forty million, six hundred seventeen thousand, six hundred eighteen".