6215449632 has 144 divisors (see below), whose sum is σ = 19680155712. Its totient is φ = 1682311680.

The previous prime is 6215449631. The next prime is 6215449649. The reversal of 6215449632 is 2369445126.

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

It is not an unprimeable number, because it can be changed into a prime (6215449631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229782 + ... + 255402.

It is an arithmetic number, because the mean of its divisors is an integer number (136667748).

Almost surely, 2^6215449632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6215449632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9840077856).

6215449632 is an abundant number, since it is smaller than the sum of its proper divisors (13464706080).

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

6215449632 is a wasteful number, since it uses less digits than its factorization.

6215449632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25679 (or 25652 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 6215449632 is about 78838.1229609128. The cubic root of 6215449632 is about 1838.6152183159.

The spelling of 6215449632 in words is "six billion, two hundred fifteen million, four hundred forty-nine thousand, six hundred thirty-two".