165500655006451 has 2 divisors, whose sum is σ = 165500655006452. Its totient is φ = 165500655006450.

The previous prime is 165500655006389. The next prime is 165500655006503. The reversal of 165500655006451 is 154600556005561.

It is a strong prime.

It is an emirp because it is prime and its reverse (154600556005561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165500655006451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165500655006395 and 165500655006404.

It is not a weakly prime, because it can be changed into another prime (165500655006151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750327503225 + 82750327503226.

It is an arithmetic number, because the mean of its divisors is an integer number (82750327503226).

Almost surely, 2^{165500655006451} is an apocalyptic number.

165500655006451 is a deficient number, since it is larger than the sum of its proper divisors (1).

165500655006451 is an equidigital number, since it uses as much as digits as its factorization.

165500655006451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700000, while the sum is 49.

The spelling of 165500655006451 in words is "one hundred sixty-five trillion, five hundred billion, six hundred fifty-five million, six thousand, four hundred fifty-one".