257978119970 has 8 divisors (see below), whose sum is σ = 464360615964. Its totient is φ = 103191247984.

The previous prime is 257978119909. The next prime is 257978119999. The reversal of 257978119970 is 79911879752.

It can be written as a sum of positive squares in 2 ways, for example, as 254886648769 + 3091471201 = 504863^2 + 55601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 257978119897 and 257978119906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12898905989 + ... + 12898906008.

Almost surely, 2^257978119970 is an apocalyptic number.

257978119970 is a deficient number, since it is larger than the sum of its proper divisors (206382495994).

257978119970 is a wasteful number, since it uses less digits than its factorization.

257978119970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25797812004.

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

The spelling of 257978119970 in words is "two hundred fifty-seven billion, nine hundred seventy-eight million, one hundred nineteen thousand, nine hundred seventy".