2650644864 has 128 divisors (see below), whose sum is σ = 8940748800. Its totient is φ = 757320192.

The previous prime is 2650644827. The next prime is 2650644881. The reversal of 2650644864 is 4684460562.

2650644864 is a `hidden beast` number, since 26 + 506 + 44 + 86 + 4 = 666.

2650644864 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 tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30592 + ... + 78975.

It is an arithmetic number, because the mean of its divisors is an integer number (69849600).

Almost surely, 2^2650644864 is an apocalyptic number.

2650644864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2650644864 is an abundant number, since it is smaller than the sum of its proper divisors (6290103936).

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

2650644864 is a wasteful number, since it uses less digits than its factorization.

2650644864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109597 (or 109579 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The square root of 2650644864 is about 51484.4137967987. The cubic root of 2650644864 is about 1383.9397436650.

The spelling of 2650644864 in words is "two billion, six hundred fifty million, six hundred forty-four thousand, eight hundred sixty-four".