2664445056 has 128 divisors (see below), whose sum is σ = 8710800000. Its totient is φ = 702701568.

The previous prime is 2664445039. The next prime is 2664445057. The reversal of 2664445056 is 6505444662.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a junction number, because it is equal to n+sod(n) for n = 2664444999 and 2664445017.

It is not an unprimeable number, because it can be changed into a prime (2664445057) 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, 3181 + ... + 73068.

It is an arithmetic number, because the mean of its divisors is an integer number (68053125).

Almost surely, 2^2664445056 is an apocalyptic number.

2664445056 is a gapful number since it is divisible by the number (26) 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 2664445056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4355400000).

2664445056 is an abundant number, since it is smaller than the sum of its proper divisors (6046354944).

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

2664445056 is a wasteful number, since it uses less digits than its factorization.

2664445056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76286 (or 76274 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The square root of 2664445056 is about 51618.2628146279. The cubic root of 2664445056 is about 1386.3373470097.

The spelling of 2664445056 in words is "two billion, six hundred sixty-four million, four hundred forty-five thousand, fifty-six".