5661659536 has 45 divisors (see below), whose sum is σ = 11886392961. Its totient is φ = 2611267776.

The previous prime is 5661659533. The next prime is 5661659587. The reversal of 5661659536 is 6359561665.

It is a happy number.

The square root of 5661659536 is 75244.

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

It can be written as a sum of positive squares in only one way, i.e., 837523600 + 4824135936 = 28940^2 + 69456^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661659533) 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 8 ways as a sum of consecutive naturals, for example, 3911965 + ... + 3913411.

Almost surely, 2^5661659536 is an apocalyptic number.

5661659536 is the 75244-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661659536

5661659536 is an abundant number, since it is smaller than the sum of its proper divisors (6224733425).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661659536 is an equidigital number, since it uses as much as digits as its factorization.

5661659536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 1462 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 52.

The cubic root of 5661659536 is about 1782.3018169586.

The spelling of 5661659536 in words is "five billion, six hundred sixty-one million, six hundred fifty-nine thousand, five hundred thirty-six".