4220555785 has 16 divisors (see below), whose sum is σ = 5461263360. Its totient is φ = 3120716160.

The previous prime is 4220555771. The next prime is 4220555789. The reversal of 4220555785 is 5875550224.

It is not a de Polignac number, because 4220555785 - 2¹⁵ = 4220523017 is a prime.

It is a super-2 number, since 2×4220555785² = 35626182268593932450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4220555789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537897 + ... + 545686.

It is an arithmetic number, because the mean of its divisors is an integer number (341328960).

Almost surely, 2^4220555785 is an apocalyptic number.

It is an amenable number.

4220555785 is a deficient number, since it is larger than the sum of its proper divisors (1240707575).

4220555785 is a wasteful number, since it uses less digits than its factorization.

4220555785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083648.

The product of its (nonzero) digits is 560000, while the sum is 43.

The square root of 4220555785 is about 64965.8047360302. The cubic root of 4220555785 is about 1616.0565295768.

The spelling of 4220555785 in words is "four billion, two hundred twenty million, five hundred fifty-five thousand, seven hundred eighty-five".