9781248272519 has 2 divisors, whose sum is σ = 9781248272520. Its totient is φ = 9781248272518.

The previous prime is 9781248272501. The next prime is 9781248272561. The reversal of 9781248272519 is 9152728421879.

9781248272519 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 a de Polignac number, because none of the positive numbers 2^k-9781248272519 is a prime.

It is a super-2 number, since 2×9781248272519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9781248272119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890624136259 + 4890624136260.

It is an arithmetic number, because the mean of its divisors is an integer number (4890624136260).

Almost surely, 2^{9781248272519} is an apocalyptic number.

9781248272519 is a deficient number, since it is larger than the sum of its proper divisors (1).

9781248272519 is an equidigital number, since it uses as much as digits as its factorization.

9781248272519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 65.

The spelling of 9781248272519 in words is "nine trillion, seven hundred eighty-one billion, two hundred forty-eight million, two hundred seventy-two thousand, five hundred nineteen".