5661651051161 has 16 divisors (see below), whose sum is σ = 6687743698944. Its totient is φ = 4692367743504.

The previous prime is 5661651051143. The next prime is 5661651051169. The reversal of 5661651051161 is 1611501561665.

It is not a de Polignac number, because 5661651051161 - 2³⁴ = 5644471181977 is a prime.

It is a super-2 number, since 2×5661651051161² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5661651051169) 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 15 ways as a sum of consecutive naturals, for example, 103639355 + ... + 103693968.

It is an arithmetic number, because the mean of its divisors is an integer number (417983981184).

Almost surely, 2^{5661651051161} is an apocalyptic number.

It is an amenable number.

5661651051161 is a deficient number, since it is larger than the sum of its proper divisors (1026092647783).

5661651051161 is a wasteful number, since it uses less digits than its factorization.

5661651051161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207333460.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 5661651051161 in words is "five trillion, six hundred sixty-one billion, six hundred fifty-one million, fifty-one thousand, one hundred sixty-one".