257979466919 has 8 divisors (see below), whose sum is σ = 258741946320. Its totient is φ = 257217097536.

The previous prime is 257979466889. The next prime is 257979466951. The reversal of 257979466919 is 919664979752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257979466919 is a prime.

It is a super-2 number, since 2×257979466919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257979466219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8817587 + ... + 8846795.

It is an arithmetic number, because the mean of its divisors is an integer number (32342743290).

Almost surely, 2^257979466919 is an apocalyptic number.

257979466919 is a deficient number, since it is larger than the sum of its proper divisors (762479401).

257979466919 is a wasteful number, since it uses less digits than its factorization.

257979466919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55009.

The product of its digits is 462944160, while the sum is 74.

The spelling of 257979466919 in words is "two hundred fifty-seven billion, nine hundred seventy-nine million, four hundred sixty-six thousand, nine hundred nineteen".