6621523101013 has 8 divisors (see below), whose sum is σ = 6731903204280. Its totient is φ = 6511202047680.

The previous prime is 6621523101001. The next prime is 6621523101023. The reversal of 6621523101013 is 3101013251266.

It can be written as a sum of positive squares in 4 ways, for example, as 591271799364 + 6030251301649 = 768942^2 + 2455657^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6621523101013 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 (6621523101023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14536318 + ... + 14984911.

It is an arithmetic number, because the mean of its divisors is an integer number (841487900535).

Almost surely, 2^{6621523101013} is an apocalyptic number.

It is an amenable number.

6621523101013 is a deficient number, since it is larger than the sum of its proper divisors (110380103267).

6621523101013 is a wasteful number, since it uses less digits than its factorization.

6621523101013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29524967.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 6621523101013 its reverse (3101013251266), we get a palindrome (9722536352279).

The spelling of 6621523101013 in words is "six trillion, six hundred twenty-one billion, five hundred twenty-three million, one hundred one thousand, thirteen".