5194821761 has 4 divisors (see below), whose sum is σ = 5195860992. Its totient is φ = 5193782532.

The previous prime is 5194821721. The next prime is 5194821803. The reversal of 5194821761 is 1671284915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1671284915 = 5 ⋅334256983.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5194821761 is a prime.

It is a super-2 number, since 2×5194821761² = 53972346257118282242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5194821721) 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 3 ways as a sum of consecutive naturals, for example, 512081 + ... + 522126.

It is an arithmetic number, because the mean of its divisors is an integer number (1298965248).

Almost surely, 2^5194821761 is an apocalyptic number.

It is an amenable number.

5194821761 is a deficient number, since it is larger than the sum of its proper divisors (1039231).

5194821761 is a wasteful number, since it uses less digits than its factorization.

5194821761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039230.

The product of its digits is 120960, while the sum is 44.

The square root of 5194821761 is about 72075.1119388656. Note that the first 3 decimals coincide. The cubic root of 5194821761 is about 1731.9029436455.

The spelling of 5194821761 in words is "five billion, one hundred ninety-four million, eight hundred twenty-one thousand, seven hundred sixty-one".