490951161 has 6 divisors (see below), whose sum is σ = 709151690. Its totient is φ = 327300768.

The previous prime is 490951147. The next prime is 490951163. The reversal of 490951161 is 161159094.

490951161 is a `hidden beast` number, since 490 + 9 + 5 + 1 + 161 = 666.

It can be written as a sum of positive squares in only one way, i.e., 463325625 + 27625536 = 21525^2 + 5256^2 .

It is not a de Polignac number, because 490951161 - 2⁵ = 490951129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490951163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27275056 + ... + 27275073.

Almost surely, 2^490951161 is an apocalyptic number.

It is an amenable number.

490951161 is a deficient number, since it is larger than the sum of its proper divisors (218200529).

490951161 is a wasteful number, since it uses less digits than its factorization.

490951161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54550135 (or 54550132 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 490951161 is about 22157.4177421468. The cubic root of 490951161 is about 788.8833023394.

The spelling of 490951161 in words is "four hundred ninety million, nine hundred fifty-one thousand, one hundred sixty-one".