98943664443849 has 81 divisors (see below), whose sum is σ = 152573358002247. Its totient is φ = 64160337182256.

The previous prime is 98943664443839. The next prime is 98943664443931. The reversal of 98943664443849 is 94834446634989.

The square root of 98943664443849 is 9947043.

It is a perfect power (a square), and thus also a powerful number.

98943664443849 is a `hidden beast` number, since 9 + 8 + 9 + 4 + 36 + 64 + 443 + 84 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88536149703225 + 10407514740624 = 9409365^2 + 3226068^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 98943664443849 - 2³⁷ = 98806225490377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (98943664443839) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 29811286212 + ... + 29811289530.

Almost surely, 2^{98943664443849} is an apocalyptic number.

98943664443849 is the 9947043-rd square number.

98943664443849 is the 4973522-nd centered octagonal number.

It is an amenable number.

98943664443849 is a deficient number, since it is larger than the sum of its proper divisors (53629693558398).

98943664443849 is an frugal number, since it uses more digits than its factorization.

98943664443849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736 (or 3359 counting only the distinct ones).

The product of its digits is 15479341056, while the sum is 81.

98943664443849 divided by its sum of digits (81) gives a square (1221526721529 = 1105227²).

The spelling of 98943664443849 in words is "ninety-eight trillion, nine hundred forty-three billion, six hundred sixty-four million, four hundred forty-three thousand, eight hundred forty-nine".