2780525785 has 16 divisors (see below), whose sum is σ = 3403959552. Its totient is φ = 2179912000.

The previous prime is 2780525777. The next prime is 2780525789. The reversal of 2780525785 is 5875250872.

It is not a de Polignac number, because 2780525785 - 2³ = 2780525777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780525789) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35835 + ... + 82735.

It is an arithmetic number, because the mean of its divisors is an integer number (212747472).

Almost surely, 2^2780525785 is an apocalyptic number.

It is an amenable number.

2780525785 is a deficient number, since it is larger than the sum of its proper divisors (623433767).

2780525785 is a wasteful number, since it uses less digits than its factorization.

2780525785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47144.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The square root of 2780525785 is about 52730.6911105857. The cubic root of 2780525785 is about 1406.1845078701.

The spelling of 2780525785 in words is "two billion, seven hundred eighty million, five hundred twenty-five thousand, seven hundred eighty-five".