15457828513217 has 2 divisors, whose sum is σ = 15457828513218. Its totient is φ = 15457828513216.

The previous prime is 15457828513187. The next prime is 15457828513241. The reversal of 15457828513217 is 71231582875451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12457574961841 + 3000253551376 = 3529529^2 + 1732124^2 .

It is a cyclic number.

It is not a de Polignac number, because 15457828513217 - 2⁴⁰ = 14358316885441 is a prime.

It is not a weakly prime, because it can be changed into another prime (15457828513297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7728914256608 + 7728914256609.

It is an arithmetic number, because the mean of its divisors is an integer number (7728914256609).

Almost surely, 2^{15457828513217} is an apocalyptic number.

It is an amenable number.

15457828513217 is a deficient number, since it is larger than the sum of its proper divisors (1).

15457828513217 is an equidigital number, since it uses as much as digits as its factorization.

15457828513217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816000, while the sum is 59.

The spelling of 15457828513217 in words is "fifteen trillion, four hundred fifty-seven billion, eight hundred twenty-eight million, five hundred thirteen thousand, two hundred seventeen".