6149221809 has 16 divisors (see below), whose sum is σ = 8369806464. Its totient is φ = 4014358400.

The previous prime is 6149221789. The next prime is 6149221823. The reversal of 6149221809 is 9081229416.

It is a cyclic number.

It is not a de Polignac number, because 6149221809 - 2⁷ = 6149221681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6149221109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45724 + ... + 119954.

It is an arithmetic number, because the mean of its divisors is an integer number (523112904).

Almost surely, 2^6149221809 is an apocalyptic number.

It is an amenable number.

6149221809 is a deficient number, since it is larger than the sum of its proper divisors (2220584655).

6149221809 is a wasteful number, since it uses less digits than its factorization.

6149221809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74808.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 6149221809 is about 78416.9739852285. The cubic root of 6149221809 is about 1832.0615195529.

The spelling of 6149221809 in words is "six billion, one hundred forty-nine million, two hundred twenty-one thousand, eight hundred nine".