6499388322 has 192 divisors, whose sum is σ = 17220403200. Its totient is φ = 1836345168.

The previous prime is 6499388321. The next prime is 6499388353. The reversal of 6499388322 is 2238839946.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6499388321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21170493 + ... + 21170799.

It is an arithmetic number, because the mean of its divisors is an integer number (89689600).

Almost surely, 2^6499388322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6499388322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8610201600).

6499388322 is an abundant number, since it is smaller than the sum of its proper divisors (10721014878).

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

6499388322 is a wasteful number, since it uses less digits than its factorization.

6499388322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 446 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 6499388322 is about 80618.7839278167. The cubic root of 6499388322 is about 1866.1970356758.

The spelling of 6499388322 in words is "six billion, four hundred ninety-nine million, three hundred eighty-eight thousand, three hundred twenty-two".