491765715 has 96 divisors (see below), whose sum is σ = 1077053760. Its totient is φ = 211534848.

The previous prime is 491765693. The next prime is 491765719. The reversal of 491765715 is 517567194.

491765715 is a `hidden beast` number, since 4 + 9 + 1 + 76 + 571 + 5 = 666.

It is not a de Polignac number, because 491765715 - 2¹² = 491761619 is a prime.

It is a super-3 number, since 3×491765715³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (491765719) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 110269 + ... + 114641.

It is an arithmetic number, because the mean of its divisors is an integer number (11219310).

Almost surely, 2^491765715 is an apocalyptic number.

491765715 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491765715 is an abundant number, since it is smaller than the sum of its proper divisors (585288045).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491765715 is a wasteful number, since it uses less digits than its factorization.

491765715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418 (or 4405 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 491765715 is about 22175.7911921988. The cubic root of 491765715 is about 789.3193491045.

The spelling of 491765715 in words is "four hundred ninety-one million, seven hundred sixty-five thousand, seven hundred fifteen".