6249221664 has 72 divisors (see below), whose sum is σ = 19082459088. Its totient is φ = 1785490560.

The previous prime is 6249221623. The next prime is 6249221683. The reversal of 6249221664 is 4661229426.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659542 + ... + 668949.

It is an arithmetic number, because the mean of its divisors is an integer number (265034154).

Almost surely, 2^6249221664 is an apocalyptic number.

It is an amenable number.

6249221664 is an abundant number, since it is smaller than the sum of its proper divisors (12833237424).

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

6249221664 is a wasteful number, since it uses less digits than its factorization.

6249221664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328518 (or 1328503 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 6249221664 is about 79052.0187218518. The cubic root of 6249221664 is about 1841.9392817634.

The spelling of 6249221664 in words is "six billion, two hundred forty-nine million, two hundred twenty-one thousand, six hundred sixty-four".