1545986916497 has 2 divisors, whose sum is σ = 1545986916498. Its totient is φ = 1545986916496.

The previous prime is 1545986916473. The next prime is 1545986916527. The reversal of 1545986916497 is 7946196895451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1426104086416 + 119882830081 = 1194196^2 + 346241^2 .

It is an emirp because it is prime and its reverse (7946196895451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1545986916497 - 2⁸ = 1545986916241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1545986916407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772993458248 + 772993458249.

It is an arithmetic number, because the mean of its divisors is an integer number (772993458249).

Almost surely, 2^{1545986916497} is an apocalyptic number.

It is an amenable number.

1545986916497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545986916497 is an equidigital number, since it uses as much as digits as its factorization.

1545986916497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 587865600, while the sum is 74.

The spelling of 1545986916497 in words is "one trillion, five hundred forty-five billion, nine hundred eighty-six million, nine hundred sixteen thousand, four hundred ninety-seven".