2778545427 has 16 divisors (see below), whose sum is σ = 4456815360. Its totient is φ = 1504174752.

The previous prime is 2778545423. The next prime is 2778545437. The reversal of 2778545427 is 7245458772.

It is a happy number.

It is not a de Polignac number, because 2778545427 - 2² = 2778545423 is a prime.

It is a super-2 number, since 2×2778545427² = 15440629379805224658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2778545427.

It is not an unprimeable number, because it can be changed into a prime (2778545423) 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, 3481488 + ... + 3482285.

It is an arithmetic number, because the mean of its divisors is an integer number (278550960).

Almost surely, 2^2778545427 is an apocalyptic number.

2778545427 is a deficient number, since it is larger than the sum of its proper divisors (1678269933).

2778545427 is a wasteful number, since it uses less digits than its factorization.

2778545427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6963802.

The product of its digits is 4390400, while the sum is 51.

The square root of 2778545427 is about 52711.9097263607. The cubic root of 2778545427 is about 1405.8505889954.

The spelling of 2778545427 in words is "two billion, seven hundred seventy-eight million, five hundred forty-five thousand, four hundred twenty-seven".