2778830761 has 16 divisors (see below), whose sum is σ = 3364623360. Its totient is φ = 2240409600.

The previous prime is 2778830749. The next prime is 2778830777. The reversal of 2778830761 is 1670388772.

2778830761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2778830761 - 2¹³ = 2778822569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2778830711) 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, 226185 + ... + 238153.

It is an arithmetic number, because the mean of its divisors is an integer number (210288960).

Almost surely, 2^2778830761 is an apocalyptic number.

It is an amenable number.

2778830761 is a deficient number, since it is larger than the sum of its proper divisors (585792599).

2778830761 is a wasteful number, since it uses less digits than its factorization.

2778830761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13944.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 2778830761 is about 52714.6161989253. The cubic root of 2778830761 is about 1405.8987104859.

The spelling of 2778830761 in words is "two billion, seven hundred seventy-eight million, eight hundred thirty thousand, seven hundred sixty-one".