2768618249 has 4 divisors (see below), whose sum is σ = 2931478164. Its totient is φ = 2605758336.

The previous prime is 2768618243. The next prime is 2768618257. The reversal of 2768618249 is 9428168672.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1801408249 + 967210000 = 42443^2 + 31100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768618249 - 2¹² = 2768614153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2768618249.

It is not an unprimeable number, because it can be changed into a prime (2768618243) 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, 81429932 + ... + 81429965.

It is an arithmetic number, because the mean of its divisors is an integer number (732869541).

Almost surely, 2^2768618249 is an apocalyptic number.

It is an amenable number.

2768618249 is a deficient number, since it is larger than the sum of its proper divisors (162859915).

2768618249 is a wasteful number, since it uses less digits than its factorization.

2768618249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162859914.

The product of its digits is 2322432, while the sum is 53.

The square root of 2768618249 is about 52617.6609989460. The cubic root of 2768618249 is about 1404.1743182897.

The spelling of 2768618249 in words is "two billion, seven hundred sixty-eight million, six hundred eighteen thousand, two hundred forty-nine".