2061944064 has 108 divisors (see below), whose sum is σ = 5977185396. Its totient is φ = 683606016.

The previous prime is 2061944063. The next prime is 2061944069. The reversal of 2061944064 is 4604491602.

2061944064 is a `hidden beast` number, since 206 + 1 + 9 + 440 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 508953600 + 1552990464 = 22560^2 + 39408^2 .

It is a super-2 number, since 2×2061944064² = 8503226646129672192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061944063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442354 + ... + 446990.

Almost surely, 2^2061944064 is an apocalyptic number.

2061944064 is a gapful number since it is divisible by the number (24) 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 2061944064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2988592698).

2061944064 is an abundant number, since it is smaller than the sum of its proper divisors (3915241332).

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

2061944064 is a wasteful number, since it uses less digits than its factorization.

2061944064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 4835 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 2061944064 is about 45408.6342450420. The cubic root of 2061944064 is about 1272.7964633355.

The spelling of 2061944064 in words is "two billion, sixty-one million, nine hundred forty-four thousand, sixty-four".