99752573561 has 2 divisors, whose sum is σ = 99752573562. Its totient is φ = 99752573560.

The previous prime is 99752573519. The next prime is 99752573579. The reversal of 99752573561 is 16537525799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73038305536 + 26714268025 = 270256^2 + 163445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99752573561 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99752573561.

It is not a weakly prime, because it can be changed into another prime (99752573761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49876286780 + 49876286781.

It is an arithmetic number, because the mean of its divisors is an integer number (49876286781).

Almost surely, 2^99752573561 is an apocalyptic number.

It is an amenable number.

99752573561 is a deficient number, since it is larger than the sum of its proper divisors (1).

99752573561 is an equidigital number, since it uses as much as digits as its factorization.

99752573561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17860500, while the sum is 59.

The spelling of 99752573561 in words is "ninety-nine billion, seven hundred fifty-two million, five hundred seventy-three thousand, five hundred sixty-one".