16565375025097 has 2 divisors, whose sum is σ = 16565375025098. Its totient is φ = 16565375025096.

The previous prime is 16565375025091. The next prime is 16565375025163. The reversal of 16565375025097 is 79052057356561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16030902907321 + 534472117776 = 4003861^2 + 731076^2 .

It is a cyclic number.

It is not a de Polignac number, because 16565375025097 - 2³⁵ = 16531015286729 is a prime.

It is not a weakly prime, because it can be changed into another prime (16565375025091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282687512548 + 8282687512549.

It is an arithmetic number, because the mean of its divisors is an integer number (8282687512549).

Almost surely, 2^{16565375025097} is an apocalyptic number.

It is an amenable number.

16565375025097 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565375025097 is an equidigital number, since it uses as much as digits as its factorization.

16565375025097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535000, while the sum is 61.

The spelling of 16565375025097 in words is "sixteen trillion, five hundred sixty-five billion, three hundred seventy-five million, twenty-five thousand, ninety-seven".