1561500616063 has 2 divisors, whose sum is σ = 1561500616064. Its totient is φ = 1561500616062.

The previous prime is 1561500616051. The next prime is 1561500616111. The reversal of 1561500616063 is 3606160051651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561500616063 - 2³³ = 1552910681471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561500616163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780750308031 + 780750308032.

It is an arithmetic number, because the mean of its divisors is an integer number (780750308032).

Almost surely, 2^{1561500616063} is an apocalyptic number.

1561500616063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561500616063 is an equidigital number, since it uses as much as digits as its factorization.

1561500616063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 1561500616063 in words is "one trillion, five hundred sixty-one billion, five hundred million, six hundred sixteen thousand, sixty-three".