6450221564 has 6 divisors (see below), whose sum is σ = 11287887744. Its totient is φ = 3225110780.

The previous prime is 6450221563. The next prime is 6450221573. The reversal of 6450221564 is 4651220546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450221563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806277692 + ... + 806277699.

It is an arithmetic number, because the mean of its divisors is an integer number (1881314624).

Almost surely, 2^6450221564 is an apocalyptic number.

It is an amenable number.

6450221564 is a deficient number, since it is larger than the sum of its proper divisors (4837666180).

6450221564 is a wasteful number, since it uses less digits than its factorization.

6450221564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612555395 (or 1612555393 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 6450221564 is about 80313.2714064120. The cubic root of 6450221564 is about 1861.4792991390.

The spelling of 6450221564 in words is "six billion, four hundred fifty million, two hundred twenty-one thousand, five hundred sixty-four".