2646611646 has 64 divisors (see below), whose sum is σ = 6462125568. Its totient is φ = 705374208.

The previous prime is 2646611599. The next prime is 2646611651. The reversal of 2646611646 is 6461166462.

2646611646 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 = 2646611598 and 2646611607.

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, 64281 + ... + 97083.

It is an arithmetic number, because the mean of its divisors is an integer number (100970712).

Almost surely, 2^2646611646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2646611646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3231062784).

2646611646 is an abundant number, since it is smaller than the sum of its proper divisors (3815513922).

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

2646611646 is a wasteful number, since it uses less digits than its factorization.

2646611646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32945.

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

The square root of 2646611646 is about 51445.2295747623. The cubic root of 2646611646 is about 1383.2374536666.

The spelling of 2646611646 in words is "two billion, six hundred forty-six million, six hundred eleven thousand, six hundred forty-six".