5149681919 has 4 divisors (see below), whose sum is σ = 5188992600. Its totient is φ = 5110371240.

The previous prime is 5149681909. The next prime is 5149682029. The reversal of 5149681919 is 9191869415.

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

It is a cyclic number.

It is not a de Polignac number, because 5149681919 - 2²⁴ = 5132904703 is a prime.

It is a super-2 number, since 2×5149681919² = 53038447733751045122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5149681909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19655144 + ... + 19655405.

It is an arithmetic number, because the mean of its divisors is an integer number (1297248150).

Almost surely, 2^5149681919 is an apocalyptic number.

5149681919 is a deficient number, since it is larger than the sum of its proper divisors (39310681).

5149681919 is a wasteful number, since it uses less digits than its factorization.

5149681919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39310680.

The product of its digits is 699840, while the sum is 53.

The square root of 5149681919 is about 71761.2842624768. The cubic root of 5149681919 is about 1726.8719488337.

The spelling of 5149681919 in words is "five billion, one hundred forty-nine million, six hundred eighty-one thousand, nine hundred nineteen".