10256042454509 has 2 divisors, whose sum is σ = 10256042454510. Its totient is φ = 10256042454508.

The previous prime is 10256042454479. The next prime is 10256042454547. The reversal of 10256042454509 is 90545424065201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5356030776100 + 4900011678409 = 2314310^2 + 2213597^2 .

It is a cyclic number.

It is not a de Polignac number, because 10256042454509 - 2²⁰ = 10256041405933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10256042454409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5128021227254 + 5128021227255.

It is an arithmetic number, because the mean of its divisors is an integer number (5128021227255).

Almost surely, 2^{10256042454509} is an apocalyptic number.

It is an amenable number.

10256042454509 is a deficient number, since it is larger than the sum of its proper divisors (1).

10256042454509 is an equidigital number, since it uses as much as digits as its factorization.

10256042454509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 10256042454509 in words is "ten trillion, two hundred fifty-six billion, forty-two million, four hundred fifty-four thousand, five hundred nine".