2780252705 has 16 divisors (see below), whose sum is σ = 3436901184. Its totient is φ = 2157503040.

The previous prime is 2780252687. The next prime is 2780252773. The reversal of 2780252705 is 5072520872.

It is not a de Polignac number, because 2780252705 - 2¹⁰ = 2780251681 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38534 + ... + 83936.

It is an arithmetic number, because the mean of its divisors is an integer number (214806324).

Almost surely, 2^2780252705 is an apocalyptic number.

It is an amenable number.

2780252705 is a deficient number, since it is larger than the sum of its proper divisors (656648479).

2780252705 is a wasteful number, since it uses less digits than its factorization.

2780252705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45776.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 2780252705 is about 52728.1016631549. The cubic root of 2780252705 is about 1406.1384718003.

The spelling of 2780252705 in words is "two billion, seven hundred eighty million, two hundred fifty-two thousand, seven hundred five".