5617715821 has 4 divisors (see below), whose sum is σ = 5620407100. Its totient is φ = 5615024544.

The previous prime is 5617715801. The next prime is 5617715861. The reversal of 5617715821 is 1285177165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5225121225 + 392594596 = 72285^2 + 19814^2 .

It is a cyclic number.

It is not a de Polignac number, because 5617715821 - 2¹³ = 5617707629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5617715801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342506 + ... + 1346683.

It is an arithmetic number, because the mean of its divisors is an integer number (1405101775).

Almost surely, 2^5617715821 is an apocalyptic number.

It is an amenable number.

5617715821 is a deficient number, since it is larger than the sum of its proper divisors (2691279).

5617715821 is a wasteful number, since it uses less digits than its factorization.

5617715821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691278.

The product of its digits is 117600, while the sum is 43.

The square root of 5617715821 is about 74951.4230752159. The cubic root of 5617715821 is about 1777.6786451535.

The spelling of 5617715821 in words is "five billion, six hundred seventeen million, seven hundred fifteen thousand, eight hundred twenty-one".