2782651409 has 4 divisors (see below), whose sum is σ = 2946336804. Its totient is φ = 2618966016.

The previous prime is 2782651381. The next prime is 2782651429. The reversal of 2782651409 is 9041562872.

It is a happy number.

2782651409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1445140225 + 1337511184 = 38015^2 + 36572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2782651409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2782651409.

It is not an unprimeable number, because it can be changed into a prime (2782651429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81842672 + ... + 81842705.

It is an arithmetic number, because the mean of its divisors is an integer number (736584201).

Almost surely, 2^2782651409 is an apocalyptic number.

It is an amenable number.

2782651409 is a deficient number, since it is larger than the sum of its proper divisors (163685395).

2782651409 is a wasteful number, since it uses less digits than its factorization.

2782651409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163685394.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2782651409 is about 52750.8427326048. The cubic root of 2782651409 is about 1406.5427444558.

The spelling of 2782651409 in words is "two billion, seven hundred eighty-two million, six hundred fifty-one thousand, four hundred nine".