4055215561 has 8 divisors (see below), whose sum is σ = 4068206600. Its totient is φ = 4042241280.

The previous prime is 4055215517. The next prime is 4055215573. The reversal of 4055215561 is 1655125504.

It can be written as a sum of positive squares in 4 ways, for example, as 602948025 + 3452267536 = 24555^2 + 58756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4055215561 - 2¹⁷ = 4055084489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4055210561) 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, 623635 + ... + 630103.

It is an arithmetic number, because the mean of its divisors is an integer number (508525825).

Almost surely, 2^4055215561 is an apocalyptic number.

It is an amenable number.

4055215561 is a deficient number, since it is larger than the sum of its proper divisors (12991039).

4055215561 is a wasteful number, since it uses less digits than its factorization.

4055215561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379.

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 4055215561 is about 63680.5744399342. The cubic root of 4055215561 is about 1594.6718023113.

The spelling of 4055215561 in words is "four billion, fifty-five million, two hundred fifteen thousand, five hundred sixty-one".