491146693490 has 16 divisors (see below), whose sum is σ = 936067816152. Its totient is φ = 184902284544.

The previous prime is 491146693463. The next prime is 491146693501. The reversal of 491146693490 is 94396641194.

It can be written as a sum of positive squares in 4 ways, for example, as 340865642569 + 150281050921 = 583837^2 + 387661^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444548929 + ... + 1444549268.

Almost surely, 2^491146693490 is an apocalyptic number.

491146693490 is a deficient number, since it is larger than the sum of its proper divisors (444921122662).

491146693490 is a wasteful number, since it uses less digits than its factorization.

491146693490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889098221.

The product of its (nonzero) digits is 5038848, while the sum is 56.

The spelling of 491146693490 in words is "four hundred ninety-one billion, one hundred forty-six million, six hundred ninety-three thousand, four hundred ninety".