5661200161 has 4 divisors (see below), whose sum is σ = 5662512832. Its totient is φ = 5659887492.

The previous prime is 5661200143. The next prime is 5661200177. The reversal of 5661200161 is 1610021665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5661200161 - 2⁷ = 5661200033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661200261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649845 + ... + 658498.

It is an arithmetic number, because the mean of its divisors is an integer number (1415628208).

Almost surely, 2^5661200161 is an apocalyptic number.

It is an amenable number.

5661200161 is a deficient number, since it is larger than the sum of its proper divisors (1312671).

5661200161 is a wasteful number, since it uses less digits than its factorization.

5661200161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312670.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 5661200161 is about 75240.9473691022. The cubic root of 5661200161 is about 1782.2536115966.

The spelling of 5661200161 in words is "five billion, six hundred sixty-one million, two hundred thousand, one hundred sixty-one".