2778580749 has 16 divisors (see below), whose sum is σ = 4348462208. Its totient is φ = 1544847552.

The previous prime is 2778580723. The next prime is 2778580769. The reversal of 2778580749 is 9470858772.

It is not a de Polignac number, because 2778580749 - 2⁷ = 2778580621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778580769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787242 + ... + 1788795.

It is an arithmetic number, because the mean of its divisors is an integer number (271778888).

Almost surely, 2^2778580749 is an apocalyptic number.

It is an amenable number.

2778580749 is a deficient number, since it is larger than the sum of its proper divisors (1569881459).

2778580749 is a wasteful number, since it uses less digits than its factorization.

2778580749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576084.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The square root of 2778580749 is about 52712.2447729178. The cubic root of 2778580749 is about 1405.8565462184.

The spelling of 2778580749 in words is "two billion, seven hundred seventy-eight million, five hundred eighty thousand, seven hundred forty-nine".