491129154 has 12 divisors (see below), whose sum is σ = 1064113206. Its totient is φ = 163709712.

The previous prime is 491129141. The next prime is 491129159. The reversal of 491129154 is 451921194.

It is a happy number.

491129154 is a `hidden beast` number, since 491 + 12 + 9 + 154 = 666.

It can be written as a sum of positive squares in only one way, i.e., 473715225 + 17413929 = 21765^2 + 4173^2 .

It is not an unprimeable number, because it can be changed into a prime (491129159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13642459 + ... + 13642494.

Almost surely, 2^491129154 is an apocalyptic number.

491129154 is an abundant number, since it is smaller than the sum of its proper divisors (572984052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491129154 is a wasteful number, since it uses less digits than its factorization.

491129154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27284961 (or 27284958 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 491129154 is about 22161.4339337508. The cubic root of 491129154 is about 788.9786266481.

The spelling of 491129154 in words is "four hundred ninety-one million, one hundred twenty-nine thousand, one hundred fifty-four".