2766781871 has 4 divisors (see below), whose sum is σ = 3162036432. Its totient is φ = 2371527312.

The previous prime is 2766781793. The next prime is 2766781873. The reversal of 2766781871 is 1781876672.

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

It is not a de Polignac number, because 2766781871 - 2¹⁸ = 2766519727 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 (2766781873) 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, 197627270 + ... + 197627283.

It is an arithmetic number, because the mean of its divisors is an integer number (790509108).

Almost surely, 2^2766781871 is an apocalyptic number.

2766781871 is a deficient number, since it is larger than the sum of its proper divisors (395254561).

2766781871 is an equidigital number, since it uses as much as digits as its factorization.

2766781871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395254560.

The product of its digits is 1580544, while the sum is 53.

The square root of 2766781871 is about 52600.2078988287. The cubic root of 2766781871 is about 1403.8637945413.

The spelling of 2766781871 in words is "two billion, seven hundred sixty-six million, seven hundred eighty-one thousand, eight hundred seventy-one".