99685987646043 has 4 divisors (see below), whose sum is σ = 132914650194728. Its totient is φ = 66457325097360.

The previous prime is 99685987646023. The next prime is 99685987646051. The reversal of 99685987646043 is 34064678958699.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99685987646043 - 2³⁴ = 99668807776859 is a prime.

It is a super-2 number, since 2×99685987646043² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99685987646023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16614331274338 + ... + 16614331274343.

It is an arithmetic number, because the mean of its divisors is an integer number (33228662548682).

Almost surely, 2^{99685987646043} is an apocalyptic number.

99685987646043 is a deficient number, since it is larger than the sum of its proper divisors (33228662548685).

99685987646043 is a wasteful number, since it uses less digits than its factorization.

99685987646043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33228662548684.

The product of its (nonzero) digits is 16930529280, while the sum is 84.

The spelling of 99685987646043 in words is "ninety-nine trillion, six hundred eighty-five billion, nine hundred eighty-seven million, six hundred forty-six thousand, forty-three".