5478696509 has 16 divisors (see below), whose sum is σ = 6438687360. Its totient is φ = 4595952960.

The previous prime is 5478696473. The next prime is 5478696511. The reversal of 5478696509 is 9056968745.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5478696509 is a prime.

It is a super-2 number, since 2×5478696509² = 60032230875457574162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5478690509) 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, 648887 + ... + 657275.

It is an arithmetic number, because the mean of its divisors is an integer number (402417960).

Almost surely, 2^5478696509 is an apocalyptic number.

It is an amenable number.

5478696509 is a deficient number, since it is larger than the sum of its proper divisors (959990851).

5478696509 is a wasteful number, since it uses less digits than its factorization.

5478696509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The square root of 5478696509 is about 74018.2174130126. The cubic root of 5478696509 is about 1762.8921659343.

The spelling of 5478696509 in words is "five billion, four hundred seventy-eight million, six hundred ninety-six thousand, five hundred nine".