8405560061 has 4 divisors (see below), whose sum is σ = 8466914652. Its totient is φ = 8344205472.

The previous prime is 8405560027. The next prime is 8405560091. The reversal of 8405560061 is 1600655048.

It is a happy number.

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 6435087961 + 1970472100 = 80219^2 + 44390^2 .

It is a cyclic number.

It is not a de Polignac number, because 8405560061 - 2¹⁰ = 8405559037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8405560091) 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 3 ways as a sum of consecutive naturals, for example, 30677090 + ... + 30677363.

It is an arithmetic number, because the mean of its divisors is an integer number (2116728663).

Almost surely, 2^8405560061 is an apocalyptic number.

It is an amenable number.

8405560061 is a deficient number, since it is larger than the sum of its proper divisors (61354591).

8405560061 is a wasteful number, since it uses less digits than its factorization.

8405560061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61354590.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 8405560061 is about 91681.8415009210. The cubic root of 8405560061 is about 2033.2411246877.

The spelling of 8405560061 in words is "eight billion, four hundred five million, five hundred sixty thousand, sixty-one".