6521120653 has 8 divisors (see below), whose sum is σ = 6682714688. Its totient is φ = 6361416864.

The previous prime is 6521120633. The next prime is 6521120659. The reversal of 6521120653 is 3560211256.

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

It is a cyclic number.

It is not a de Polignac number, because 6521120653 - 2⁵ = 6521120621 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 (6521120659) 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, 465576 + ... + 479377.

It is an arithmetic number, because the mean of its divisors is an integer number (835339336).

Almost surely, 2^6521120653 is an apocalyptic number.

It is an amenable number.

6521120653 is a deficient number, since it is larger than the sum of its proper divisors (161594035).

6521120653 is a wasteful number, since it uses less digits than its factorization.

6521120653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945123.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 6521120653 is about 80753.4559817721. The cubic root of 6521120653 is about 1868.2747538405.

The spelling of 6521120653 in words is "six billion, five hundred twenty-one million, one hundred twenty thousand, six hundred fifty-three".