13345355621 has 8 divisors (see below), whose sum is σ = 14393739360. Its totient is φ = 12300088752.

The previous prime is 13345355539. The next prime is 13345355629. The reversal of 13345355621 is 12655354331.

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 13345355621 - 2¹⁸ = 13345093477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13345355629) 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, 770315 + ... + 787448.

It is an arithmetic number, because the mean of its divisors is an integer number (1799217420).

Almost surely, 2^13345355621 is an apocalyptic number.

It is an amenable number.

13345355621 is a deficient number, since it is larger than the sum of its proper divisors (1048383739).

13345355621 is a wasteful number, since it uses less digits than its factorization.

13345355621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558435.

The product of its digits is 162000, while the sum is 38.

The spelling of 13345355621 in words is "thirteen billion, three hundred forty-five million, three hundred fifty-five thousand, six hundred twenty-one".