5616800921 has 4 divisors (see below), whose sum is σ = 5618521344. Its totient is φ = 5615080500.

The previous prime is 5616800831. The next prime is 5616800923. The reversal of 5616800921 is 1290086165.

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: 1290086165 = 5 ⋅258017233.

It is a cyclic number.

It is not a de Polignac number, because 5616800921 - 2¹⁸ = 5616538777 is a prime.

It is a super-2 number, since 2×5616800921² = 63096905172292896482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5616800923) 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, 855305 + ... + 861846.

It is an arithmetic number, because the mean of its divisors is an integer number (1404630336).

Almost surely, 2^5616800921 is an apocalyptic number.

It is an amenable number.

5616800921 is a deficient number, since it is larger than the sum of its proper divisors (1720423).

5616800921 is a wasteful number, since it uses less digits than its factorization.

5616800921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720422.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 5616800921 is about 74945.3195403155. The cubic root of 5616800921 is about 1777.5821357926.

The spelling of 5616800921 in words is "five billion, six hundred sixteen million, eight hundred thousand, nine hundred twenty-one".