491026611 has 4 divisors (see below), whose sum is σ = 654702152. Its totient is φ = 327351072.

The previous prime is 491026607. The next prime is 491026631. The reversal of 491026611 is 116620194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 491026611 - 2² = 491026607 is a prime.

It is a super-2 number, since 2×491026611² = 482214265420290642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491026631) 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, 81837766 + ... + 81837771.

It is an arithmetic number, because the mean of its divisors is an integer number (163675538).

Almost surely, 2^491026611 is an apocalyptic number.

491026611 is a deficient number, since it is larger than the sum of its proper divisors (163675541).

491026611 is a wasteful number, since it uses less digits than its factorization.

491026611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163675540.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 491026611 is about 22159.1202668337. The cubic root of 491026611 is about 788.9237124665.

The spelling of 491026611 in words is "four hundred ninety-one million, twenty-six thousand, six hundred eleven".