2649646320 has 160 divisors (see below), whose sum is σ = 8541953280. Its totient is φ = 678881280.

The previous prime is 2649646319. The next prime is 2649646357. The reversal of 2649646320 is 236469462.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 657271 + ... + 661289.

It is an arithmetic number, because the mean of its divisors is an integer number (53387208).

Almost surely, 2^2649646320 is an apocalyptic number.

2649646320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649646320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4270976640).

2649646320 is an abundant number, since it is smaller than the sum of its proper divisors (5892306960).

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

2649646320 is a wasteful number, since it uses less digits than its factorization.

2649646320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 2649646320 is about 51474.7153464689. The cubic root of 2649646320 is about 1383.7659371178.

The spelling of 2649646320 in words is "two billion, six hundred forty-nine million, six hundred forty-six thousand, three hundred twenty".