99481981643 has 8 divisors (see below), whose sum is σ = 109012463616. Its totient is φ = 90032610600.

The previous prime is 99481981631. The next prime is 99481981667. The reversal of 99481981643 is 34618918499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99481981643 - 2¹² = 99481977547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99481984643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20275163 + ... + 20280068.

It is an arithmetic number, because the mean of its divisors is an integer number (13626557952).

Almost surely, 2^99481981643 is an apocalyptic number.

99481981643 is a deficient number, since it is larger than the sum of its proper divisors (9530481973).

99481981643 is a wasteful number, since it uses less digits than its factorization.

99481981643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40555465.

The product of its digits is 13436928, while the sum is 62.

The spelling of 99481981643 in words is "ninety-nine billion, four hundred eighty-one million, nine hundred eighty-one thousand, six hundred forty-three".