491580057 has 8 divisors (see below), whose sum is σ = 657198784. Its totient is φ = 326840688.

The previous prime is 491580053. The next prime is 491580059. The reversal of 491580057 is 750085194.

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

It is not a de Polignac number, because 491580057 - 2² = 491580053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491579997 and 491580024.

It is not an unprimeable number, because it can be changed into a prime (491580053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218533 + ... + 220770.

It is an arithmetic number, because the mean of its divisors is an integer number (82149848).

Almost surely, 2^491580057 is an apocalyptic number.

It is an amenable number.

491580057 is a deficient number, since it is larger than the sum of its proper divisors (165618727).

491580057 is a wasteful number, since it uses less digits than its factorization.

491580057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439679.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 491580057 is about 22171.6047457102. The cubic root of 491580057 is about 789.2200051196.

The spelling of 491580057 in words is "four hundred ninety-one million, five hundred eighty thousand, fifty-seven".