5661873556 has 6 divisors (see below), whose sum is σ = 9908278730. Its totient is φ = 2830936776.

The previous prime is 5661873521. The next prime is 5661873577. The reversal of 5661873556 is 6553781665.

It can be written as a sum of positive squares in only one way, i.e., 5165296900 + 496576656 = 71870^2 + 22284^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707734191 + ... + 707734198.

Almost surely, 2^5661873556 is an apocalyptic number.

It is an amenable number.

5661873556 is a deficient number, since it is larger than the sum of its proper divisors (4246405174).

5661873556 is a wasteful number, since it uses less digits than its factorization.

5661873556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415468393 (or 1415468391 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 52.

The square root of 5661873556 is about 75245.4221597567. The cubic root of 5661873556 is about 1782.3242746512.

The spelling of 5661873556 in words is "five billion, six hundred sixty-one million, eight hundred seventy-three thousand, five hundred fifty-six".