257978119969 has 4 divisors (see below), whose sum is σ = 260389130544. Its totient is φ = 255567109396.

The previous prime is 257978119909. The next prime is 257978119999. The reversal of 257978119969 is 969911879752.

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 257978119969 - 2¹³ = 257978111777 is a prime.

It is a super-2 number, since 2×257978119969² (a number of 24 digits) contains 22 as substring.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205505127 + ... + 1205505340.

It is an arithmetic number, because the mean of its divisors is an integer number (65097282636).

Almost surely, 2^257978119969 is an apocalyptic number.

It is an amenable number.

257978119969 is a deficient number, since it is larger than the sum of its proper divisors (2411010575).

257978119969 is a wasteful number, since it uses less digits than its factorization.

257978119969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411010574.

The product of its digits is 154314720, while the sum is 73.

The spelling of 257978119969 in words is "two hundred fifty-seven billion, nine hundred seventy-eight million, one hundred nineteen thousand, nine hundred sixty-nine".