2785795509 has 16 divisors (see below), whose sum is σ = 4246946432. Its totient is φ = 1591161408.

The previous prime is 2785795499. The next prime is 2785795591. The reversal of 2785795509 is 9055975872.

It is not a de Polignac number, because 2785795509 - 2⁹ = 2785794997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785715509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19227 + ... + 77079.

It is an arithmetic number, because the mean of its divisors is an integer number (265434152).

Almost surely, 2^2785795509 is an apocalyptic number.

It is an amenable number.

2785795509 is a deficient number, since it is larger than the sum of its proper divisors (1461150923).

2785795509 is a wasteful number, since it uses less digits than its factorization.

2785795509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60156.

The product of its (nonzero) digits is 7938000, while the sum is 57.

The square root of 2785795509 is about 52780.6357388768. The cubic root of 2785795509 is about 1407.0722929401.

The spelling of 2785795509 in words is "two billion, seven hundred eighty-five million, seven hundred ninety-five thousand, five hundred nine".