840256755 has 32 divisors (see below), whose sum is σ = 1451084544. Its totient is φ = 412734336.

The previous prime is 840256751. The next prime is 840256771. The reversal of 840256755 is 557652048.

840256755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 840256755 - 2² = 840256751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840256751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86452 + ... + 95678.

It is an arithmetic number, because the mean of its divisors is an integer number (45346392).

Almost surely, 2^840256755 is an apocalyptic number.

840256755 is a deficient number, since it is larger than the sum of its proper divisors (610827789).

840256755 is a wasteful number, since it uses less digits than its factorization.

840256755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9715.

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 840256755 is about 28987.1825985210. The cubic root of 840256755 is about 943.6349205176.

The spelling of 840256755 in words is "eight hundred forty million, two hundred fifty-six thousand, seven hundred fifty-five".