15506606556137 has 2 divisors, whose sum is σ = 15506606556138. Its totient is φ = 15506606556136.

The previous prime is 15506606556073. The next prime is 15506606556151. The reversal of 15506606556137 is 73165560660551.

15506606556137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8595075973696 + 6911530582441 = 2931736^2 + 2628979^2 .

It is a cyclic number.

It is not a de Polignac number, because 15506606556137 - 2⁶ = 15506606556073 is a prime.

It is not a weakly prime, because it can be changed into another prime (15506606556157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753303278068 + 7753303278069.

It is an arithmetic number, because the mean of its divisors is an integer number (7753303278069).

Almost surely, 2^{15506606556137} is an apocalyptic number.

It is an amenable number.

15506606556137 is a deficient number, since it is larger than the sum of its proper divisors (1).

15506606556137 is an equidigital number, since it uses as much as digits as its factorization.

15506606556137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010000, while the sum is 56.

The spelling of 15506606556137 in words is "fifteen trillion, five hundred six billion, six hundred six million, five hundred fifty-six thousand, one hundred thirty-seven".