5278621849 has 2 divisors, whose sum is σ = 5278621850. Its totient is φ = 5278621848.

The previous prime is 5278621801. The next prime is 5278621861. The reversal of 5278621849 is 9481268725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4808035600 + 470586249 = 69340^2 + 21693^2 .

It is a cyclic number.

It is not a de Polignac number, because 5278621849 - 2¹³ = 5278613657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5278621796 and 5278621805.

It is not a weakly prime, because it can be changed into another prime (5278621879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639310924 + 2639310925.

It is an arithmetic number, because the mean of its divisors is an integer number (2639310925).

Almost surely, 2^5278621849 is an apocalyptic number.

It is an amenable number.

5278621849 is a deficient number, since it is larger than the sum of its proper divisors (1).

5278621849 is an equidigital number, since it uses as much as digits as its factorization.

5278621849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 52.

The square root of 5278621849 is about 72654.1247899939. The cubic root of 5278621849 is about 1741.1660226204.

The spelling of 5278621849 in words is "five billion, two hundred seventy-eight million, six hundred twenty-one thousand, eight hundred forty-nine".