2778147249 has 16 divisors (see below), whose sum is σ = 3925393920. Its totient is φ = 1744615040.

The previous prime is 2778147247. The next prime is 2778147277. The reversal of 2778147249 is 9427418772.

2778147249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2778147249 - 2¹ = 2778147247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2778147247) 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, 385857 + ... + 392990.

It is an arithmetic number, because the mean of its divisors is an integer number (245337120).

Almost surely, 2^2778147249 is an apocalyptic number.

2778147249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2778147249 is a deficient number, since it is larger than the sum of its proper divisors (1147246671).

2778147249 is a wasteful number, since it uses less digits than its factorization.

2778147249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778920.

The product of its digits is 1580544, while the sum is 51.

The square root of 2778147249 is about 52708.1326647037. The cubic root of 2778147249 is about 1405.7834308927.

The spelling of 2778147249 in words is "two billion, seven hundred seventy-eight million, one hundred forty-seven thousand, two hundred forty-nine".