5319778978 has 4 divisors (see below), whose sum is σ = 7979668470. Its totient is φ = 2659889488.

The previous prime is 5319778969. The next prime is 5319778991. The reversal of 5319778978 is 8798779135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5249437209 + 70341769 = 72453^2 + 8387^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1329944743 + ... + 1329944746.

Almost surely, 2^5319778978 is an apocalyptic number.

5319778978 is a deficient number, since it is larger than the sum of its proper divisors (2659889492).

5319778978 is a wasteful number, since it uses less digits than its factorization.

5319778978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659889491.

The product of its digits is 26671680, while the sum is 64.

The square root of 5319778978 is about 72936.8149702193. The cubic root of 5319778978 is about 1745.6795713306.

The spelling of 5319778978 in words is "five billion, three hundred nineteen million, seven hundred seventy-eight thousand, nine hundred seventy-eight".