2649904782 has 64 divisors (see below), whose sum is σ = 6220268544. Its totient is φ = 736957440.

The previous prime is 2649904771. The next prime is 2649904823. The reversal of 2649904782 is 2874099462.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 243183 + ... + 253845.

It is an arithmetic number, because the mean of its divisors is an integer number (97191696).

Almost surely, 2^2649904782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649904782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110134272).

2649904782 is an abundant number, since it is smaller than the sum of its proper divisors (3570363762).

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

2649904782 is a wasteful number, since it uses less digits than its factorization.

2649904782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10833.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 2649904782 is about 51477.2258576548. The cubic root of 2649904782 is about 1383.8109291960.

The spelling of 2649904782 in words is "two billion, six hundred forty-nine million, nine hundred four thousand, seven hundred eighty-two".