1646997591103 has 2 divisors, whose sum is σ = 1646997591104. Its totient is φ = 1646997591102.

The previous prime is 1646997591023. The next prime is 1646997591139. The reversal of 1646997591103 is 3011957996461.

It is a strong prime.

It is an emirp because it is prime and its reverse (3011957996461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646997591103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646997594103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823498795551 + 823498795552.

It is an arithmetic number, because the mean of its divisors is an integer number (823498795552).

Almost surely, 2^{1646997591103} is an apocalyptic number.

1646997591103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646997591103 is an equidigital number, since it uses as much as digits as its factorization.

1646997591103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 1646997591103 in words is "one trillion, six hundred forty-six billion, nine hundred ninety-seven million, five hundred ninety-one thousand, one hundred three".