2778533247 has 16 divisors (see below), whose sum is σ = 4245960960. Its totient is φ = 1583231232.

The previous prime is 2778533237. The next prime is 2778533249. The reversal of 2778533247 is 7423358772.

It is not a de Polignac number, because 2778533247 - 2⁴ = 2778533231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2778533196 and 2778533205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778533249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179997 + ... + 194822.

It is an arithmetic number, because the mean of its divisors is an integer number (265372560).

Almost surely, 2^2778533247 is an apocalyptic number.

2778533247 is a deficient number, since it is larger than the sum of its proper divisors (1467427713).

2778533247 is a wasteful number, since it uses less digits than its factorization.

2778533247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375182.

The product of its digits is 1975680, while the sum is 48.

The square root of 2778533247 is about 52711.7941925714. The cubic root of 2778533247 is about 1405.8485347689.

The spelling of 2778533247 in words is "two billion, seven hundred seventy-eight million, five hundred thirty-three thousand, two hundred forty-seven".