501866361 has 20 divisors (see below), whose sum is σ = 789162000. Its totient is φ = 316967256.

The previous prime is 501866341. The next prime is 501866369. The reversal of 501866361 is 163668105.

It is a happy number.

501866361 is a `hidden beast` number, since 5 + 0 + 18 + 6 + 636 + 1 = 666.

It is not a de Polignac number, because 501866361 - 2¹³ = 501858169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501866369) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 161511 + ... + 164588.

It is an arithmetic number, because the mean of its divisors is an integer number (39458100).

Almost surely, 2^501866361 is an apocalyptic number.

It is an amenable number.

501866361 is a deficient number, since it is larger than the sum of its proper divisors (287295639).

501866361 is a wasteful number, since it uses less digits than its factorization.

501866361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326130 (or 326121 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 501866361 is about 22402.3740036631. The cubic root of 501866361 is about 794.6868542420.

The spelling of 501866361 in words is "five hundred one million, eight hundred sixty-six thousand, three hundred sixty-one".