1647971057119 has 2 divisors, whose sum is σ = 1647971057120. Its totient is φ = 1647971057118.

The previous prime is 1647971057069. The next prime is 1647971057171. The reversal of 1647971057119 is 9117501797461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1647971057119 is a prime.

It is a super-2 number, since 2×1647971057119² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1647971057519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823985528559 + 823985528560.

It is an arithmetic number, because the mean of its divisors is an integer number (823985528560).

Almost surely, 2^{1647971057119} is an apocalyptic number.

1647971057119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1647971057119 is an equidigital number, since it uses as much as digits as its factorization.

1647971057119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3333960, while the sum is 58.

The spelling of 1647971057119 in words is "one trillion, six hundred forty-seven billion, nine hundred seventy-one million, fifty-seven thousand, one hundred nineteen".