499778182665 has 24 divisors (see below), whose sum is σ = 867804692040. Its totient is φ = 266079899904.

The previous prime is 499778182633. The next prime is 499778182667. The reversal of 499778182665 is 566281877994.

499778182665 is a `hidden beast` number, since 499 + 7 + 78 + 1 + 8 + 2 + 6 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 127371899664 + 372406283001 = 356892^2 + 610251^2 .

It is not a de Polignac number, because 499778182665 - 2⁵ = 499778182633 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 499778182593 and 499778182602.

It is not an unprimeable number, because it can be changed into a prime (499778182667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9733782 + ... + 9784991.

It is an arithmetic number, because the mean of its divisors is an integer number (36158528835).

Almost surely, 2^499778182665 is an apocalyptic number.

499778182665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

499778182665 is a deficient number, since it is larger than the sum of its proper divisors (368026509375).

499778182665 is a wasteful number, since it uses less digits than its factorization.

499778182665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19519353 (or 19519350 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 499778182665 in words is "four hundred ninety-nine billion, seven hundred seventy-eight million, one hundred eighty-two thousand, six hundred sixty-five".