99985191041 has 4 divisors (see below), whose sum is σ = 99985921284. Its totient is φ = 99984460800.

The previous prime is 99985191011. The next prime is 99985191071. The reversal of 99985191041 is 14019158999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14019158999 = 4127 ⋅3396937.

It is an interprime number because it is at equal distance from previous prime (99985191011) and next prime (99985191071).

It can be written as a sum of positive squares in 2 ways, for example, as 98661322816 + 1323868225 = 314104^2 + 36385^2 .

It is a cyclic number.

It is not a de Polignac number, because 99985191041 - 2³⁴ = 82805321857 is a prime.

It is a deceptive number, since it divides R_99985191040.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99985191011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91280 + ... + 456401.

It is an arithmetic number, because the mean of its divisors is an integer number (24996480321).

Almost surely, 2^99985191041 is an apocalyptic number.

99985191041 is the 182561-st octagonal number.

It is an amenable number.

99985191041 is a deficient number, since it is larger than the sum of its proper divisors (730243).

99985191041 is a wasteful number, since it uses less digits than its factorization.

99985191041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730242.

The product of its (nonzero) digits is 1049760, while the sum is 56.

The spelling of 99985191041 in words is "ninety-nine billion, nine hundred eighty-five million, one hundred ninety-one thousand, forty-one".