99505738861 has 2 divisors, whose sum is σ = 99505738862. Its totient is φ = 99505738860.

The previous prime is 99505738789. The next prime is 99505738889. The reversal of 99505738861 is 16883750599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53374860900 + 46130877961 = 231030^2 + 214781^2 .

It is a cyclic number.

It is not a de Polignac number, because 99505738861 - 2⁹ = 99505738349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99505738861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99505738361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49752869430 + 49752869431.

It is an arithmetic number, because the mean of its divisors is an integer number (49752869431).

Almost surely, 2^99505738861 is an apocalyptic number.

It is an amenable number.

99505738861 is a deficient number, since it is larger than the sum of its proper divisors (1).

99505738861 is an equidigital number, since it uses as much as digits as its factorization.

99505738861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 99505738861 in words is "ninety-nine billion, five hundred five million, seven hundred thirty-eight thousand, eight hundred sixty-one".