265161366613987 has 2 divisors, whose sum is σ = 265161366613988. Its totient is φ = 265161366613986.

The previous prime is 265161366613981. The next prime is 265161366614021. The reversal of 265161366613987 is 789316663161562.

265161366613987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265161366613987 - 2³⁹ = 264611610800099 is a prime.

It is not a weakly prime, because it can be changed into another prime (265161366613981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132580683306993 + 132580683306994.

It is an arithmetic number, because the mean of its divisors is an integer number (132580683306994).

Almost surely, 2^{265161366613987} is an apocalyptic number.

265161366613987 is a deficient number, since it is larger than the sum of its proper divisors (1).

265161366613987 is an equidigital number, since it uses as much as digits as its factorization.

265161366613987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 70.

The spelling of 265161366613987 in words is "two hundred sixty-five trillion, one hundred sixty-one billion, three hundred sixty-six million, six hundred thirteen thousand, nine hundred eighty-seven".