15606564002123 has 2 divisors, whose sum is σ = 15606564002124. Its totient is φ = 15606564002122.

The previous prime is 15606564002077. The next prime is 15606564002173. The reversal of 15606564002123 is 32120046560651.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15606564002123 - 2²² = 15606559807819 is a prime.

It is a super-2 number, since 2×15606564002123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15606564002173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7803282001061 + 7803282001062.

It is an arithmetic number, because the mean of its divisors is an integer number (7803282001062).

Almost surely, 2^{15606564002123} is an apocalyptic number.

15606564002123 is a deficient number, since it is larger than the sum of its proper divisors (1).

15606564002123 is an equidigital number, since it uses as much as digits as its factorization.

15606564002123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 15606564002123 in words is "fifteen trillion, six hundred six billion, five hundred sixty-four million, two thousand, one hundred twenty-three".