491148757 has 8 divisors (see below), whose sum is σ = 536140800. Its totient is φ = 446213760.

The previous prime is 491148719. The next prime is 491148761. The reversal of 491148757 is 757841194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 491148757 - 2⁷ = 491148629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491148797) 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, 4869 + ... + 31717.

It is an arithmetic number, because the mean of its divisors is an integer number (67017600).

Almost surely, 2^491148757 is an apocalyptic number.

It is an amenable number.

491148757 is a deficient number, since it is larger than the sum of its proper divisors (44992043).

491148757 is a wasteful number, since it uses less digits than its factorization.

491148757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28523.

The product of its digits is 282240, while the sum is 46.

The square root of 491148757 is about 22161.8762066753. The cubic root of 491148757 is about 788.9891236440.

The spelling of 491148757 in words is "four hundred ninety-one million, one hundred forty-eight thousand, seven hundred fifty-seven".