1255687028256 has 48 divisors (see below), whose sum is σ = 3296477749824. Its totient is φ = 418524336384.

The previous prime is 1255687028231. The next prime is 1255687028257. The reversal of 1255687028256 is 6528207865521.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1255687028196 and 1255687028205.

It is not an unprimeable number, because it can be changed into a prime (1255687028257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478941 + ... + 1655523.

It is an arithmetic number, because the mean of its divisors is an integer number (68676619788).

Almost surely, 2^{1255687028256} is an apocalyptic number.

1255687028256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1255687028256 is an abundant number, since it is smaller than the sum of its proper divisors (2040790721568).

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

1255687028256 is a wasteful number, since it uses less digits than its factorization.

1255687028256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187713 (or 1187705 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 57.

The spelling of 1255687028256 in words is "one trillion, two hundred fifty-five billion, six hundred eighty-seven million, twenty-eight thousand, two hundred fifty-six".