1720145102563 has 2 divisors, whose sum is σ = 1720145102564. Its totient is φ = 1720145102562.

The previous prime is 1720145102539. The next prime is 1720145102579. The reversal of 1720145102563 is 3652015410271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720145102563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720145102513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860072551281 + 860072551282.

It is an arithmetic number, because the mean of its divisors is an integer number (860072551282).

Almost surely, 2^{1720145102563} is an apocalyptic number.

1720145102563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720145102563 is an equidigital number, since it uses as much as digits as its factorization.

1720145102563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 1720145102563 in words is "one trillion, seven hundred twenty billion, one hundred forty-five million, one hundred two thousand, five hundred sixty-three".