1256144444856 has 64 divisors (see below), whose sum is σ = 3987760147200. Its totient is φ = 358898412384.

The previous prime is 1256144444843. The next prime is 1256144444911. The reversal of 1256144444856 is 6584444416521.

1256144444856 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 144 + 4 + 448 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415390170 + ... + 415393193.

It is an arithmetic number, because the mean of its divisors is an integer number (62308752300).

Almost surely, 2^{1256144444856} is an apocalyptic number.

It is an amenable number.

1256144444856 is an abundant number, since it is smaller than the sum of its proper divisors (2731615702344).

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

1256144444856 is a wasteful number, since it uses less digits than its factorization.

1256144444856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830783385 (or 830783375 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 54.

The spelling of 1256144444856 in words is "one trillion, two hundred fifty-six billion, one hundred forty-four million, four hundred forty-four thousand, eight hundred fifty-six".