19602263561 has 2 divisors, whose sum is σ = 19602263562. Its totient is φ = 19602263560.

The previous prime is 19602263557. The next prime is 19602263579. The reversal of 19602263561 is 16536220691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12973210000 + 6629053561 = 113900^2 + 81419^2 .

It is a cyclic number.

It is not a de Polignac number, because 19602263561 - 2² = 19602263557 is a prime.

It is not a weakly prime, because it can be changed into another prime (19602263591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9801131780 + 9801131781.

It is an arithmetic number, because the mean of its divisors is an integer number (9801131781).

Almost surely, 2^19602263561 is an apocalyptic number.

It is an amenable number.

19602263561 is a deficient number, since it is larger than the sum of its proper divisors (1).

19602263561 is an equidigital number, since it uses as much as digits as its factorization.

19602263561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 19602263561 in words is "nineteen billion, six hundred two million, two hundred sixty-three thousand, five hundred sixty-one".