5661723554 has 16 divisors (see below), whose sum is σ = 8997811128. Its totient is φ = 2662662912.

The previous prime is 5661723553. The next prime is 5661723559. The reversal of 5661723554 is 4553271665.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5504898025 + 156825529 = 74195^2 + 12523^2 .

It is a super-2 number, since 2×5661723554² = 64110227203836781832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661723553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224 + ... + 106460.

Almost surely, 2^5661723554 is an apocalyptic number.

5661723554 is a deficient number, since it is larger than the sum of its proper divisors (3336087574).

5661723554 is a wasteful number, since it uses less digits than its factorization.

5661723554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104869.

The product of its digits is 756000, while the sum is 44.

The square root of 5661723554 is about 75244.4254014874. The cubic root of 5661723554 is about 1782.3085345983.

The spelling of 5661723554 in words is "five billion, six hundred sixty-one million, seven hundred twenty-three thousand, five hundred fifty-four".