491660542 has 8 divisors (see below), whose sum is σ = 751405896. Its totient is φ = 241191912.

The previous prime is 491660503. The next prime is 491660569. The reversal of 491660542 is 245066194.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319048 + ... + 2319259.

It is an arithmetic number, because the mean of its divisors is an integer number (93925737).

Almost surely, 2^491660542 is an apocalyptic number.

491660542 is a deficient number, since it is larger than the sum of its proper divisors (259745354).

491660542 is a wasteful number, since it uses less digits than its factorization.

491660542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638362.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 491660542 is about 22173.4197182122. The cubic root of 491660542 is about 789.2630750156.

The spelling of 491660542 in words is "four hundred ninety-one million, six hundred sixty thousand, five hundred forty-two".