5169819978 has 40 divisors (see below), whose sum is σ = 11595815748. Its totient is φ = 1721549376.

The previous prime is 5169819973. The next prime is 5169819983. The reversal of 5169819978 is 8799189615.

It is an interprime number because it is at equal distance from previous prime (5169819973) and next prime (5169819983).

It can be written as a sum of positive squares in 2 ways, for example, as 4881397689 + 288422289 = 69867^2 + 16983^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5169819973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 151900 + ... + 182792.

Almost surely, 2^5169819978 is an apocalyptic number.

5169819978 is an abundant number, since it is smaller than the sum of its proper divisors (6425995770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5169819978 is a wasteful number, since it uses less digits than its factorization.

5169819978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31940 (or 31931 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 63.

The square root of 5169819978 is about 71901.4601937958. The cubic root of 5169819978 is about 1729.1200240308.

The spelling of 5169819978 in words is "five billion, one hundred sixty-nine million, eight hundred nineteen thousand, nine hundred seventy-eight".