6502016021 has 8 divisors (see below), whose sum is σ = 6795568920. Its totient is φ = 6213086208.

The previous prime is 6502015987. The next prime is 6502016039. The reversal of 6502016021 is 1206102056.

6502016021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10491121 + 6491524900 = 3239^2 + 80570^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6502016021 - 2³⁰ = 5428274197 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 (6502016041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1152896 + ... + 1158521.

It is an arithmetic number, because the mean of its divisors is an integer number (849446115).

Almost surely, 2^6502016021 is an apocalyptic number.

It is an amenable number.

6502016021 is a deficient number, since it is larger than the sum of its proper divisors (293552899).

6502016021 is a wasteful number, since it uses less digits than its factorization.

6502016021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311543.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 6502016021 is about 80635.0793451585. The cubic root of 6502016021 is about 1866.4485025894.

Adding to 6502016021 its reverse (1206102056), we get a palindrome (7708118077).

The spelling of 6502016021 in words is "six billion, five hundred two million, sixteen thousand, twenty-one".