263078412721 has 2 divisors, whose sum is σ = 263078412722. Its totient is φ = 263078412720.

The previous prime is 263078412697. The next prime is 263078412809. The reversal of 263078412721 is 127214870362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262795668496 + 282744225 = 512636^2 + 16815^2 .

It is a cyclic number.

It is not a de Polignac number, because 263078412721 - 2²⁹ = 262541541809 is a prime.

It is not a weakly prime, because it can be changed into another prime (263078412221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131539206360 + 131539206361.

It is an arithmetic number, because the mean of its divisors is an integer number (131539206361).

Almost surely, 2^263078412721 is an apocalyptic number.

It is an amenable number.

263078412721 is a deficient number, since it is larger than the sum of its proper divisors (1).

263078412721 is an equidigital number, since it uses as much as digits as its factorization.

263078412721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 263078412721 in words is "two hundred sixty-three billion, seventy-eight million, four hundred twelve thousand, seven hundred twenty-one".