6623636253121 has 4 divisors (see below), whose sum is σ = 6623649852372. Its totient is φ = 6623622653872.

The previous prime is 6623636253107. The next prime is 6623636253127. The reversal of 6623636253121 is 1213526363266.

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 2769108996096 + 3854527257025 = 1664064^2 + 1963295^2 .

It is a cyclic number.

It is not a de Polignac number, because 6623636253121 - 2⁷ = 6623636252993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623636253127) 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, 6040810 + ... + 7052563.

It is an arithmetic number, because the mean of its divisors is an integer number (1655912463093).

Almost surely, 2^{6623636253121} is an apocalyptic number.

It is an amenable number.

6623636253121 is a deficient number, since it is larger than the sum of its proper divisors (13599251).

6623636253121 is a wasteful number, since it uses less digits than its factorization.

6623636253121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13599250.

The product of its digits is 1399680, while the sum is 46.

The spelling of 6623636253121 in words is "six trillion, six hundred twenty-three billion, six hundred thirty-six million, two hundred fifty-three thousand, one hundred twenty-one".