461621161 has 4 divisors (see below), whose sum is σ = 461664400. Its totient is φ = 461577924.

The previous prime is 461621143. The next prime is 461621239. The reversal of 461621161 is 161126164.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 461621161 - 2⁷ = 461621033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461621141) 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, 7210 + ... + 31228.

It is an arithmetic number, because the mean of its divisors is an integer number (115416100).

Almost surely, 2^461621161 is an apocalyptic number.

It is an amenable number.

461621161 is a deficient number, since it is larger than the sum of its proper divisors (43239).

461621161 is a wasteful number, since it uses less digits than its factorization.

461621161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43238.

The product of its digits is 1728, while the sum is 28.

The square root of 461621161 is about 21485.3708601923. The cubic root of 461621161 is about 772.8500445763.

The spelling of 461621161 in words is "four hundred sixty-one million, six hundred twenty-one thousand, one hundred sixty-one".