5251784578 has 8 divisors (see below), whose sum is σ = 7935178572. Its totient is φ = 2606725056.

The previous prime is 5251784563. The next prime is 5251784599. The reversal of 5251784578 is 8754871525.

It can be written as a sum of positive squares in 2 ways, for example, as 4760586009 + 491198569 = 68997^2 + 22163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 9583275 + ... + 9583822.

Almost surely, 2^5251784578 is an apocalyptic number.

5251784578 is a deficient number, since it is larger than the sum of its proper divisors (2683393994).

5251784578 is a wasteful number, since it uses less digits than its factorization.

5251784578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19167236.

The product of its digits is 3136000, while the sum is 52.

The square root of 5251784578 is about 72469.1974427756. The cubic root of 5251784578 is about 1738.2102284097.

The spelling of 5251784578 in words is "five billion, two hundred fifty-one million, seven hundred eighty-four thousand, five hundred seventy-eight".