15660228226133 has 4 divisors (see below), whose sum is σ = 15660293198208. Its totient is φ = 15660163254060.

The previous prime is 15660228226091. The next prime is 15660228226297. The reversal of 15660228226133 is 33162282206651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15660228226133 - 2⁴⁰ = 14560716598357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15660228226633) 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, 32123141 + ... + 32607002.

It is an arithmetic number, because the mean of its divisors is an integer number (3915073299552).

Almost surely, 2^{15660228226133} is an apocalyptic number.

It is an amenable number.

15660228226133 is a deficient number, since it is larger than the sum of its proper divisors (64972075).

15660228226133 is an equidigital number, since it uses as much as digits as its factorization.

15660228226133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64972074.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 15660228226133 in words is "fifteen trillion, six hundred sixty billion, two hundred twenty-eight million, two hundred twenty-six thousand, one hundred thirty-three".