515664366 has 64 divisors (see below), whose sum is σ = 1269250560. Its totient is φ = 136304640.

The previous prime is 515664271. The next prime is 515664367. The reversal of 515664366 is 663466515.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515664367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36006 + ... + 48246.

It is an arithmetic number, because the mean of its divisors is an integer number (19832040).

Almost surely, 2^515664366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515664366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634625280).

515664366 is an abundant number, since it is smaller than the sum of its proper divisors (753586194).

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

515664366 is a wasteful number, since it uses less digits than its factorization.

515664366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12329.

The product of its digits is 388800, while the sum is 42.

The square root of 515664366 is about 22708.2444499790. The cubic root of 515664366 is about 801.9039888962.

The spelling of 515664366 in words is "five hundred fifteen million, six hundred sixty-four thousand, three hundred sixty-six".