256719197376 has 168 divisors, whose sum is σ = 782091115520. Its totient is φ = 80281787904.

The previous prime is 256719197351. The next prime is 256719197407. The reversal of 256719197376 is 673791917652.

256719197376 is a `hidden beast` number, since 2 + 5 + 6 + 71 + 9 + 197 + 376 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1013361 + ... + 1241103.

Almost surely, 2^256719197376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256719197376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391045557760).

256719197376 is an abundant number, since it is smaller than the sum of its proper divisors (525371918144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256719197376 is a wasteful number, since it uses less digits than its factorization.

256719197376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227883 (or 227870 counting only the distinct ones).

The product of its digits is 30005640, while the sum is 63.

The spelling of 256719197376 in words is "two hundred fifty-six billion, seven hundred nineteen million, one hundred ninety-seven thousand, three hundred seventy-six".