5661634505 has 4 divisors (see below), whose sum is σ = 6793961412. Its totient is φ = 4529307600.

The previous prime is 5661634493. The next prime is 5661634507. The reversal of 5661634505 is 5054361665.

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 1675101184 + 3986533321 = 40928^2 + 63139^2 .

It is not a de Polignac number, because 5661634505 - 2¹⁸ = 5661372361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661634507) 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, 566163446 + ... + 566163455.

It is an arithmetic number, because the mean of its divisors is an integer number (1698490353).

Almost surely, 2^5661634505 is an apocalyptic number.

It is an amenable number.

5661634505 is a deficient number, since it is larger than the sum of its proper divisors (1132326907).

5661634505 is a wasteful number, since it uses less digits than its factorization.

5661634505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132326906.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 5661634505 is about 75243.8336676169. The cubic root of 5661634505 is about 1782.2991903517.

The spelling of 5661634505 in words is "five billion, six hundred sixty-one million, six hundred thirty-four thousand, five hundred five".