13661225933 has 2 divisors, whose sum is σ = 13661225934. Its totient is φ = 13661225932.

The previous prime is 13661225927. The next prime is 13661225987. The reversal of 13661225933 is 33952216631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10852013929 + 2809212004 = 104173^2 + 53002^2 .

It is a cyclic number.

It is not a de Polignac number, because 13661225933 - 2¹⁶ = 13661160397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13661225833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830612966 + 6830612967.

It is an arithmetic number, because the mean of its divisors is an integer number (6830612967).

Almost surely, 2^13661225933 is an apocalyptic number.

It is an amenable number.

13661225933 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661225933 is an equidigital number, since it uses as much as digits as its factorization.

13661225933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 41.

The spelling of 13661225933 in words is "thirteen billion, six hundred sixty-one million, two hundred twenty-five thousand, nine hundred thirty-three".