5578778756 has 6 divisors (see below), whose sum is σ = 9762862830. Its totient is φ = 2789389376.

The previous prime is 5578778743. The next prime is 5578778783. The reversal of 5578778756 is 6578778755.

It can be written as a sum of positive squares in only one way, i.e., 4606336900 + 972441856 = 67870^2 + 31184^2 .

It is a super-3 number, since 3×5578778756³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 5578778692 and 5578778701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697347341 + ... + 697347348.

It is an arithmetic number, because the mean of its divisors is an integer number (1627143805).

Almost surely, 2^5578778756 is an apocalyptic number.

It is an amenable number.

5578778756 is a deficient number, since it is larger than the sum of its proper divisors (4184084074).

5578778756 is a wasteful number, since it uses less digits than its factorization.

5578778756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394694693 (or 1394694691 counting only the distinct ones).

The product of its digits is 115248000, while the sum is 65.

The square root of 5578778756 is about 74691.2227507356. Note that the first 3 decimals coincide. The cubic root of 5578778756 is about 1773.5620179042.

Subtracting 5578778756 from its reverse (6578778755), we obtain a palindrome (999999999).

The spelling of 5578778756 in words is "five billion, five hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred fifty-six".