491121103477 has 8 divisors (see below), whose sum is σ = 500829932736. Its totient is φ = 481492845792.

The previous prime is 491121103453. The next prime is 491121103531. The reversal of 491121103477 is 774301121194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491121103477 is a prime.

It is a super-2 number, since 2×491121103477² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491121103777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20130583 + ... + 20154964.

It is an arithmetic number, because the mean of its divisors is an integer number (62603741592).

Almost surely, 2^491121103477 is an apocalyptic number.

It is an amenable number.

491121103477 is a deficient number, since it is larger than the sum of its proper divisors (9708829259).

491121103477 is a wasteful number, since it uses less digits than its factorization.

491121103477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40285787.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 491121103477 in words is "four hundred ninety-one billion, one hundred twenty-one million, one hundred three thousand, four hundred seventy-seven".