4010815561 has 3 divisors (see below), whose sum is σ = 4010878893. Its totient is φ = 4010752230.

The previous prime is 4010815553. The next prime is 4010815579. The reversal of 4010815561 is 1655180104.

The square root of 4010815561 is 63331.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4010815561 - 2³ = 4010815553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4010815261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31666 + ... + 94996.

It is an arithmetic number, because the mean of its divisors is an integer number (1336959631).

Almost surely, 2^4010815561 is an apocalyptic number.

4010815561 is the 63331-st square number.

4010815561 is the 31666-th centered octagonal number.

It is an amenable number.

4010815561 is a deficient number, since it is larger than the sum of its proper divisors (63332).

4010815561 is an frugal number, since it uses more digits than its factorization.

4010815561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126662 (or 63331 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The cubic root of 4010815561 is about 1588.8304838081.

Adding to 4010815561 its reverse (1655180104), we get a palindrome (5665995665).

The spelling of 4010815561 in words is "four billion, ten million, eight hundred fifteen thousand, five hundred sixty-one".