2778423571 has 16 divisors (see below), whose sum is σ = 3469190400. Its totient is φ = 2161766880.

The previous prime is 2778423569. The next prime is 2778423623. The reversal of 2778423571 is 1753248772.

It is not a de Polignac number, because 2778423571 - 2¹ = 2778423569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778423511) 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, 25480 + ... + 78778.

It is an arithmetic number, because the mean of its divisors is an integer number (216824400).

Almost surely, 2^2778423571 is an apocalyptic number.

2778423571 is a deficient number, since it is larger than the sum of its proper divisors (690766829).

2778423571 is a wasteful number, since it uses less digits than its factorization.

2778423571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53994.

The product of its digits is 658560, while the sum is 46.

The square root of 2778423571 is about 52710.7538458710. The cubic root of 2778423571 is about 1405.8300370150.

The spelling of 2778423571 in words is "two billion, seven hundred seventy-eight million, four hundred twenty-three thousand, five hundred seventy-one".