4256556505 has 4 divisors (see below), whose sum is σ = 5107867812. Its totient is φ = 3405245200.

The previous prime is 4256556503. The next prime is 4256556523. The reversal of 4256556505 is 5056556524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2939374656 + 1317181849 = 54216^2 + 36293^2 .

It is not a de Polignac number, because 4256556505 - 2¹ = 4256556503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4256556503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425655646 + ... + 425655655.

It is an arithmetic number, because the mean of its divisors is an integer number (1276966953).

Almost surely, 2^4256556505 is an apocalyptic number.

It is an amenable number.

4256556505 is a deficient number, since it is larger than the sum of its proper divisors (851311307).

4256556505 is an equidigital number, since it uses as much as digits as its factorization.

4256556505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851311306.

The product of its (nonzero) digits is 900000, while the sum is 43.

The square root of 4256556505 is about 65242.2907706343. The cubic root of 4256556505 is about 1620.6384346656.

The spelling of 4256556505 in words is "four billion, two hundred fifty-six million, five hundred fifty-six thousand, five hundred five".