5661651172 has 6 divisors (see below), whose sum is σ = 9907889558. Its totient is φ = 2830825584.

The previous prime is 5661651169. The next prime is 5661651199. The reversal of 5661651172 is 2711561665.

It can be written as a sum of positive squares in only one way, i.e., 4433429056 + 1228222116 = 66584^2 + 35046^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707706393 + ... + 707706400.

Almost surely, 2^5661651172 is an apocalyptic number.

It is an amenable number.

5661651172 is a deficient number, since it is larger than the sum of its proper divisors (4246238386).

5661651172 is a wasteful number, since it uses less digits than its factorization.

5661651172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415412797 (or 1415412795 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 5661651172 is about 75243.9444207971. The cubic root of 5661651172 is about 1782.3009392901.

The spelling of 5661651172 in words is "five billion, six hundred sixty-one million, six hundred fifty-one thousand, one hundred seventy-two".