265142621450647 has 2 divisors, whose sum is σ = 265142621450648. Its totient is φ = 265142621450646.

The previous prime is 265142621450611. The next prime is 265142621450669. The reversal of 265142621450647 is 746054126241562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265142621450647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265142621450347) 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, 132571310725323 + 132571310725324.

It is an arithmetic number, because the mean of its divisors is an integer number (132571310725324).

Almost surely, 2^{265142621450647} is an apocalyptic number.

265142621450647 is a deficient number, since it is larger than the sum of its proper divisors (1).

265142621450647 is an equidigital number, since it uses as much as digits as its factorization.

265142621450647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 55.

The spelling of 265142621450647 in words is "two hundred sixty-five trillion, one hundred forty-two billion, six hundred twenty-one million, four hundred fifty thousand, six hundred forty-seven".