256771073878 has 8 divisors (see below), whose sum is σ = 420170848200. Its totient is φ = 116714124480.

The previous prime is 256771073851. The next prime is 256771073891. The reversal of 256771073878 is 878370177652.

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

It is a super-2 number, since 2×256771073878² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5835706203 + ... + 5835706246.

It is an arithmetic number, because the mean of its divisors is an integer number (52521356025).

Almost surely, 2^256771073878 is an apocalyptic number.

256771073878 is a deficient number, since it is larger than the sum of its proper divisors (163399774322).

256771073878 is a wasteful number, since it uses less digits than its factorization.

256771073878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671412462.

The product of its (nonzero) digits is 27659520, while the sum is 61.

The spelling of 256771073878 in words is "two hundred fifty-six billion, seven hundred seventy-one million, seventy-three thousand, eight hundred seventy-eight".