257978119907 has 4 divisors (see below), whose sum is σ = 258858591600. Its totient is φ = 257097648216.

The previous prime is 257978119879. The next prime is 257978119909. The reversal of 257978119907 is 709911879752.

257978119907 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.

It is a cyclic number.

It is not a de Polignac number, because 257978119907 - 2¹⁰ = 257978118883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257978119909) 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, 440235407 + ... + 440235992.

It is an arithmetic number, because the mean of its divisors is an integer number (64714647900).

Almost surely, 2^257978119907 is an apocalyptic number.

257978119907 is a deficient number, since it is larger than the sum of its proper divisors (880471693).

257978119907 is an equidigital number, since it uses as much as digits as its factorization.

257978119907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880471692.

The product of its (nonzero) digits is 20003760, while the sum is 65.

The spelling of 257978119907 in words is "two hundred fifty-seven billion, nine hundred seventy-eight million, one hundred nineteen thousand, nine hundred seven".