2608781642 has 16 divisors (see below), whose sum is σ = 3981761280. Its totient is φ = 1281553152.

The previous prime is 2608781639. The next prime is 2608781677. The reversal of 2608781642 is 2461878062.

It is a junction number, because it is equal to n+sod(n) for n = 2608781593 and 2608781602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244103 + ... + 254565.

It is an arithmetic number, because the mean of its divisors is an integer number (248860080).

Almost surely, 2^2608781642 is an apocalyptic number.

2608781642 is a deficient number, since it is larger than the sum of its proper divisors (1372979638).

2608781642 is a wasteful number, since it uses less digits than its factorization.

2608781642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12637.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 2608781642 is about 51076.2336317000. The cubic root of 2608781642 is about 1376.6152507797.

The spelling of 2608781642 in words is "two billion, six hundred eight million, seven hundred eighty-one thousand, six hundred forty-two".