257978119897 has 4 divisors (see below), whose sum is σ = 257996748240. Its totient is φ = 257959491556.

The previous prime is 257978119879. The next prime is 257978119909. The reversal of 257978119897 is 798911879752.

257978119897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257978119897 - 2¹⁹ = 257977595609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257978119807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9293383 + ... + 9321100.

It is an arithmetic number, because the mean of its divisors is an integer number (64499187060).

Almost surely, 2^257978119897 is an apocalyptic number.

It is an amenable number.

257978119897 is a deficient number, since it is larger than the sum of its proper divisors (18628343).

257978119897 is a wasteful number, since it uses less digits than its factorization.

257978119897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18628342.

The product of its digits is 160030080, while the sum is 73.

The spelling of 257978119897 in words is "two hundred fifty-seven billion, nine hundred seventy-eight million, one hundred nineteen thousand, eight hundred ninety-seven".