6564381490 has 8 divisors (see below), whose sum is σ = 11815886700. Its totient is φ = 2625752592.

The previous prime is 6564381443. The next prime is 6564381503. The reversal of 6564381490 is 941834656.

It can be written as a sum of positive squares in 2 ways, for example, as 6552416809 + 11964681 = 80947^2 + 3459^2 .

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

It is a super-2 number, since 2×6564381490² = 86182208692509240200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6564381490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328219065 + ... + 328219084.

Almost surely, 2^6564381490 is an apocalyptic number.

6564381490 is a deficient number, since it is larger than the sum of its proper divisors (5251505210).

6564381490 is a wasteful number, since it uses less digits than its factorization.

6564381490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656438156.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 6564381490 is about 81020.8707062569. The cubic root of 6564381490 is about 1872.3970033716.

The spelling of 6564381490 in words is "six billion, five hundred sixty-four million, three hundred eighty-one thousand, four hundred ninety".