5278357561 has 4 divisors (see below), whose sum is σ = 5507851392. Its totient is φ = 5048863732.

The previous prime is 5278357559. The next prime is 5278357573. The reversal of 5278357561 is 1657538725.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5278357561 - 2¹ = 5278357559 is a prime.

It is a super-2 number, since 2×5278357561² = 55722117083531737442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5278357961) 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 3 ways as a sum of consecutive naturals, for example, 114746881 + ... + 114746926.

It is an arithmetic number, because the mean of its divisors is an integer number (1376962848).

Almost surely, 2^5278357561 is an apocalyptic number.

It is an amenable number.

5278357561 is a deficient number, since it is larger than the sum of its proper divisors (229493831).

5278357561 is a wasteful number, since it uses less digits than its factorization.

5278357561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229493830.

The product of its digits is 1764000, while the sum is 49.

The square root of 5278357561 is about 72652.3059578979. The cubic root of 5278357561 is about 1741.1369634595.

The spelling of 5278357561 in words is "five billion, two hundred seventy-eight million, three hundred fifty-seven thousand, five hundred sixty-one".