2775791649 has 8 divisors (see below), whose sum is σ = 3716542080. Its totient is φ = 1842784496.

The previous prime is 2775791617. The next prime is 2775791653. The reversal of 2775791649 is 9461975772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2775791649 - 2⁵ = 2775791617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2775791699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934982 + ... + 1936415.

It is an arithmetic number, because the mean of its divisors is an integer number (464567760).

Almost surely, 2^2775791649 is an apocalyptic number.

It is an amenable number.

2775791649 is a deficient number, since it is larger than the sum of its proper divisors (940750431).

2775791649 is a wasteful number, since it uses less digits than its factorization.

2775791649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871639.

The product of its digits is 6667920, while the sum is 57.

The square root of 2775791649 is about 52685.7822282255. The cubic root of 2775791649 is about 1405.3859957765.

The spelling of 2775791649 in words is "two billion, seven hundred seventy-five million, seven hundred ninety-one thousand, six hundred forty-nine".