99950518079977 has 2 divisors, whose sum is σ = 99950518079978. Its totient is φ = 99950518079976.

The previous prime is 99950518079963. The next prime is 99950518080011. The reversal of 99950518079977 is 77997081505999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99950086230016 + 431849961 = 9997504^2 + 20781^2 .

It is a cyclic number.

It is not a de Polignac number, because 99950518079977 - 2³¹ = 99948370596329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99950518079894 and 99950518079903.

It is not a weakly prime, because it can be changed into another prime (99950518079917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975259039988 + 49975259039989.

It is an arithmetic number, because the mean of its divisors is an integer number (49975259039989).

Almost surely, 2^{99950518079977} is an apocalyptic number.

It is an amenable number.

99950518079977 is a deficient number, since it is larger than the sum of its proper divisors (1).

99950518079977 is an equidigital number, since it uses as much as digits as its factorization.

99950518079977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050761400, while the sum is 85.

The spelling of 99950518079977 in words is "ninety-nine trillion, nine hundred fifty billion, five hundred eighteen million, seventy-nine thousand, nine hundred seventy-seven".